diff --git a/httprunner/cli.py b/httprunner/cli.py
index 671969a3..2523c17e 100644
--- a/httprunner/cli.py
+++ b/httprunner/cli.py
@@ -73,15 +73,15 @@ def main_run(args):
     err_code = 0
     try:
         for path in args.testfile_paths:
-            summary = runner.run_path(path, dot_env_path=args.dot_env_path)
+            testsuite_summary = runner.run_path(path, dot_env_path=args.dot_env_path)
             report_dir = args.report_dir or os.path.join(os.getcwd(), "reports")
             gen_html_report(
-                summary,
+                testsuite_summary,
                 report_template=args.report_template,
                 report_dir=report_dir,
                 report_file=args.report_file
             )
-            err_code |= (0 if summary and summary["success"] else 1)
+            err_code |= (0 if testsuite_summary and testsuite_summary.success else 1)
     except Exception as ex:
         logger.error(f"!!!!!!!!!! exception stage: {runner.exception_stage} !!!!!!!!!!\n{str(ex)}")
         err_code = 1
diff --git a/httprunner/client.py b/httprunner/client.py
index 4577a40a..41e12129 100644
--- a/httprunner/client.py
+++ b/httprunner/client.py
@@ -11,6 +11,7 @@ from requests.exceptions import (InvalidSchema, InvalidURL, MissingSchema,
 
 from httprunner import response
 from httprunner.utils import lower_dict_keys, omit_long_data
+from httprunner.v3.schema import MetaData, RequestStat
 
 urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
 
@@ -107,9 +108,8 @@ class HttpSession(requests.Session):
     def init_meta_data(self):
         """ initialize meta_data, it will store detail data of request and response
         """
-        self.meta_data = {
-            "name": "",
-            "data": [
+        self.meta_data = MetaData(
+            data=[
                 {
                     "request": {
                         "url": "N/A",
@@ -124,19 +124,15 @@ class HttpSession(requests.Session):
                     }
                 }
             ],
-            "stat": {
-                "content_size": "N/A",
-                "response_time_ms": "N/A",
-                "elapsed_ms": "N/A",
-            }
-        }
+            stat=RequestStat()
+        )
 
     def update_last_req_resp_record(self, resp_obj):
         """
         update request and response info from Response() object.
         """
-        self.meta_data["data"].pop()
-        self.meta_data["data"].append(get_req_resp_record(resp_obj))
+        self.meta_data.data.pop()
+        self.meta_data.data.append(get_req_resp_record(resp_obj))
 
     def request(self, method, url, name=None, **kwargs):
         """
@@ -180,13 +176,13 @@ class HttpSession(requests.Session):
         self.init_meta_data()
 
         # record test name
-        self.meta_data["name"] = name
+        self.meta_data.name = name
 
         # record original request info
-        self.meta_data["data"][0]["request"]["method"] = method
-        self.meta_data["data"][0]["request"]["url"] = url
+        self.meta_data.data[0]["request"]["method"] = method
+        self.meta_data.data[0]["request"]["url"] = url
         kwargs.setdefault("timeout", 120)
-        self.meta_data["data"][0]["request"].update(kwargs)
+        self.meta_data.data[0]["request"].update(kwargs)
 
         start_timestamp = time.time()
         response = self._send_request_safe_mode(method, url, **kwargs)
@@ -200,15 +196,13 @@ class HttpSession(requests.Session):
             content_size = len(response.content or "")
 
         # record the consumed time
-        self.meta_data["stat"] = {
-            "response_time_ms": response_time_ms,
-            "elapsed_ms": response.elapsed.microseconds / 1000.0,
-            "content_size": content_size
-        }
+        self.meta_data.stat.response_time_ms = response_time_ms
+        self.meta_data.stat.elapsed_ms = response.elapsed.microseconds / 1000.0
+        self.meta_data.stat.content_size = content_size
 
         # record request and response histories, include 30X redirection
         response_list = response.history + [response]
-        self.meta_data["data"] = [
+        self.meta_data.data = [
             get_req_resp_record(resp_obj)
             for resp_obj in response_list
         ]
diff --git a/httprunner/report/html/gen_report.py b/httprunner/report/html/gen_report.py
index c7791183..95772079 100644
--- a/httprunner/report/html/gen_report.py
+++ b/httprunner/report/html/gen_report.py
@@ -6,20 +6,21 @@ from jinja2 import Template
 from loguru import logger
 
 from httprunner.exceptions import SummaryEmpty
+from httprunner.v3.schema import TestSuiteSummary
 
 
-def gen_html_report(summary, report_template=None, report_dir=None, report_file=None):
+def gen_html_report(testsuite_summary: TestSuiteSummary, report_template=None, report_dir=None, report_file=None):
     """ render html report with specified report name and template
 
     Args:
-        summary (dict): test result summary data
+        testsuite_summary (dict): testsuite result summary data
         report_template (str): specify html report template path, template should be in Jinja2 format.
         report_dir (str): specify html report save directory
         report_file (str): specify html report file path, this has higher priority than specifying report dir.
 
     """
-    if not summary["time"] or summary["stat"]["testcases"]["total"] == 0:
-        logger.error(f"test result summary is empty ! {summary}")
+    if not testsuite_summary.time or testsuite_summary.stat.testcases["total"] == 0:
+        logger.error(f"test result testsuite_summary is empty ! {testsuite_summary}")
         raise SummaryEmpty
 
     if not report_template:
@@ -33,9 +34,9 @@ def gen_html_report(summary, report_template=None, report_dir=None, report_file=
 
     logger.info("Start to render Html report ...")
 
-    start_at_timestamp = summary["time"]["start_at"]
+    start_at_timestamp = testsuite_summary.time.start_at
     utc_time_iso_8601_str = datetime.utcfromtimestamp(start_at_timestamp).isoformat()
-    summary["time"]["start_datetime"] = utc_time_iso_8601_str
+    testsuite_summary.time.start_datetime = utc_time_iso_8601_str
 
     if report_file:
         report_dir = os.path.dirname(report_file)
@@ -55,7 +56,7 @@ def gen_html_report(summary, report_template=None, report_dir=None, report_file=
             rendered_content = Template(
                 template_content,
                 extensions=["jinja2.ext.loopcontrols"]
-            ).render(summary)
+            ).render(testsuite_summary.dict())
             fp_w.write(rendered_content)
 
     logger.info(f"Generated Html report: {report_path}")
diff --git a/httprunner/report/html/result.py b/httprunner/report/html/result.py
index 762d0bb1..e9d88f2f 100644
--- a/httprunner/report/html/result.py
+++ b/httprunner/report/html/result.py
@@ -3,6 +3,8 @@ import unittest
 
 from loguru import logger
 
+from httprunner.v3.schema import Record
+
 
 class HtmlTestResult(unittest.TextTestResult):
     """ A html result class that can generate formatted html results.
@@ -13,13 +15,13 @@ class HtmlTestResult(unittest.TextTestResult):
         self.records = []
 
     def _record_test(self, test, status, attachment=''):
-        data = {
-            'name': test.shortDescription(),
-            'status': status,
-            'attachment': attachment,
-            "meta_datas": test.meta_datas
-        }
-        self.records.append(data)
+        record = Record(
+            name=test.shortDescription(),
+            status=status,
+            attachment=attachment,
+            meta_datas=test.meta_datas
+        )
+        self.records.append(record)
 
     def startTestRun(self):
         self.start_at = time.time()
diff --git a/httprunner/report/html/template.html b/httprunner/report/html/template.html
index 8bbfc1bf..a205a73f 100644
--- a/httprunner/report/html/template.html
+++ b/httprunner/report/html/template.html
@@ -201,7 +201,7 @@
 
     {% for record in test_suite_summary.records %}
     {% set record_index = "{}_{}".format(suite_index, loop.index) %}
-    {% set record_meta_datas = record.meta_datas_expanded %}
+    {% set record_meta_datas = record.meta_datas %}
     <tr id="record_{{record_index}}">
       <th class="{{record.status}}" style="width:5em;">{{record.status}}</th>
       <td colspan="2">{{record.name}}</td>
diff --git a/httprunner/report/stringify.py b/httprunner/report/stringify.py
index c6b9cf11..d13e2062 100644
--- a/httprunner/report/stringify.py
+++ b/httprunner/report/stringify.py
@@ -1,10 +1,13 @@
 import json
 from base64 import b64encode
 from collections import Iterable
+from typing import List
 
 from jinja2 import escape
 from requests.cookies import RequestsCookieJar
 
+from httprunner.v3.schema import TestSuiteSummary, MetaData
+
 
 def dumps_json(value):
     """ dumps json value to indented string
@@ -164,20 +167,20 @@ def __expand_meta_datas(meta_datas, meta_datas_expanded):
             [dict1, dict2, dict3]
 
     """
-    if isinstance(meta_datas, dict):
+    if isinstance(meta_datas, MetaData):
         meta_datas_expanded.append(meta_datas)
     elif isinstance(meta_datas, list):
         for meta_data in meta_datas:
             __expand_meta_datas(meta_data, meta_datas_expanded)
 
 
-def __get_total_response_time(meta_datas_expanded):
+def __get_total_response_time(meta_datas: List[MetaData]):
     """ caculate total response time of all meta_datas
     """
     try:
         response_time = 0
-        for meta_data in meta_datas_expanded:
-            response_time += meta_data["stat"]["response_time_ms"]
+        for meta_data in meta_datas:
+            response_time += meta_data.stat.response_time_ms
 
         return "{:.2f}".format(response_time)
 
@@ -186,30 +189,24 @@ def __get_total_response_time(meta_datas_expanded):
         return "N/A"
 
 
-def __stringify_meta_datas(meta_datas):
+def __stringify_meta_datas(meta_datas: List[MetaData]):
 
-    if isinstance(meta_datas, list):
-        for _meta_data in meta_datas:
-            __stringify_meta_datas(_meta_data)
-    elif isinstance(meta_datas, dict):
-        data_list = meta_datas["data"]
+    for meta_data in meta_datas:
+        data_list = meta_data.data
         for data in data_list:
             __stringify_request(data["request"])
             __stringify_response(data["response"])
 
 
-def stringify_summary(summary):
+def stringify_summary(testsuite_summary: TestSuiteSummary):
     """ stringify summary, in order to dump json file and generate html report.
     """
-    for index, suite_summary in enumerate(summary["details"]):
+    for index, testcase_summary in enumerate(testsuite_summary.details):
 
-        if not suite_summary.get("name"):
-            suite_summary["name"] = f"testcase {index}"
+        if not testcase_summary.name:
+            testcase_summary.name = f"testcase {index}"
 
-        for record in suite_summary.get("records"):
-            meta_datas = record['meta_datas']
+        for record in testcase_summary.records:
+            meta_datas = record.meta_datas
             __stringify_meta_datas(meta_datas)
-            meta_datas_expanded = []
-            __expand_meta_datas(meta_datas, meta_datas_expanded)
-            record["meta_datas_expanded"] = meta_datas_expanded
-            record["response_time"] = __get_total_response_time(meta_datas_expanded)
+            record.response_time = __get_total_response_time(meta_datas)
diff --git a/httprunner/report/summarize.py b/httprunner/report/summarize.py
index 93c7145f..404d8cb4 100644
--- a/httprunner/report/summarize.py
+++ b/httprunner/report/summarize.py
@@ -1,6 +1,8 @@
 import platform
 
 from httprunner import __version__
+from httprunner.report.html.result import HtmlTestResult
+from httprunner.v3.schema import TestCaseSummary, TestCaseStat, TestCaseTime, TestCaseInOut
 
 
 def get_platform():
@@ -38,7 +40,7 @@ def aggregate_stat(origin_stat, new_stat):
             origin_stat[key] += new_stat[key]
 
 
-def get_summary(result):
+def get_summary(result: HtmlTestResult) -> TestCaseSummary:
     """ get summary from test result
 
     Args:
@@ -55,28 +57,20 @@ def get_summary(result):
             }
 
     """
-    summary = {
-        "success": result.wasSuccessful(),
-        "stat": {
-            'total': result.testsRun,
-            'failures': len(result.failures),
-            'errors': len(result.errors),
-            'skipped': len(result.skipped),
-            'expectedFailures': len(result.expectedFailures),
-            'unexpectedSuccesses': len(result.unexpectedSuccesses)
-        }
-    }
-    summary["stat"]["successes"] = summary["stat"]["total"] \
-                                   - summary["stat"]["failures"] \
-                                   - summary["stat"]["errors"] \
-                                   - summary["stat"]["skipped"] \
-                                   - summary["stat"]["expectedFailures"] \
-                                   - summary["stat"]["unexpectedSuccesses"]
-
-    summary["time"] = {
-        'start_at': result.start_at,
-        'duration': result.duration
-    }
-    summary["records"] = result.records
-
-    return summary
+    return TestCaseSummary(
+        success=result.wasSuccessful(),
+        stat=TestCaseStat(
+            total=result.testsRun,
+            failures=len(result.failures),
+            errors=len(result.errors),
+            skipped=len(result.skipped),
+            expectedFailures=len(result.expectedFailures),
+            unexpectedSuccesses=len(result.unexpectedSuccesses)
+        ),
+        time=TestCaseTime(
+            start_at=result.start_at,
+            duration=result.duration
+        ),
+        records=result.records,
+        in_out=TestCaseInOut()
+    )
diff --git a/httprunner/v3/api.py b/httprunner/v3/api.py
index fb1708c9..b7a11d63 100644
--- a/httprunner/v3/api.py
+++ b/httprunner/v3/api.py
@@ -7,7 +7,7 @@ from loguru import logger
 
 from httprunner import report, loader, utils, exceptions, __version__
 from httprunner.v3.runner import TestCaseRunner
-from httprunner.v3.schema import TestsMapping
+from httprunner.v3.schema import TestsMapping, TestCaseSummary, TestSuiteSummary
 
 
 class HttpRunner(object):
@@ -91,10 +91,10 @@ class HttpRunner(object):
 
         return prepared_testcases
 
-    def _run_suite(self, prepared_testcases: List[unittest.TestSuite]) -> List[Dict]:
+    def _run_suite(self, prepared_testcases: List[unittest.TestSuite]) -> List[TestCaseSummary]:
         """ run prepared testcases
         """
-        tests_results: List[Dict] = []
+        tests_results: List[TestCaseSummary] = []
 
         for index, testcase in enumerate(prepared_testcases):
             log_handler = None
@@ -108,18 +108,16 @@ class HttpRunner(object):
 
             result = self.unittest_runner.run(testcase)
             testcase_summary = report.get_summary(result)
-            testcase_summary["name"] = testcase.config.name
-            testcase_summary["in_out"] = {
-                "in": testcase.config.variables,
-                "out": testcase.config.export
-            }
+            testcase_summary.name = testcase.config.name
+            testcase_summary.in_out.vars = testcase.config.variables
+            testcase_summary.in_out.out = testcase.config.export
 
             if self.save_tests and log_handler:
                 logger.remove(log_handler)
                 logs_file_abs_path = utils.prepare_log_file_abs_path(
                     self.test_path, f"testcase_{index+1}.log"
                 )
-                testcase_summary["log"] = logs_file_abs_path
+                testcase_summary.log = logs_file_abs_path
 
             if result.wasSuccessful():
                 tests_results.append(testcase_summary)
@@ -128,14 +126,14 @@ class HttpRunner(object):
 
         return tests_results
 
-    def _aggregate(self, tests_results: List[Dict]):
+    def _aggregate(self, tests_results: List[TestCaseSummary]) -> TestSuiteSummary:
         """ aggregate multiple testcase results
 
         Args:
             tests_results (list): list of testcase summary
 
         """
-        summary = {
+        testsuite_summary = {
             "success": True,
             "stat": {
                 "testcases": {
@@ -151,21 +149,21 @@ class HttpRunner(object):
         }
 
         for testcase_summary in tests_results:
-            if testcase_summary["success"]:
-                summary["stat"]["testcases"]["success"] += 1
+            if testcase_summary.success:
+                testsuite_summary["stat"]["testcases"]["success"] += 1
             else:
-                summary["stat"]["testcases"]["fail"] += 1
+                testsuite_summary["stat"]["testcases"]["fail"] += 1
 
-            summary["success"] &= testcase_summary["success"]
+            testsuite_summary["success"] &= testcase_summary.success
 
-            report.aggregate_stat(summary["stat"]["teststeps"], testcase_summary["stat"])
-            report.aggregate_stat(summary["time"], testcase_summary["time"])
+            report.aggregate_stat(testsuite_summary["stat"]["teststeps"], testcase_summary.stat.dict())
+            report.aggregate_stat(testsuite_summary["time"], testcase_summary.time.dict())
 
-            summary["details"].append(testcase_summary)
+            testsuite_summary["details"].append(testcase_summary)
 
-        return summary
+        return TestSuiteSummary.parse_obj(testsuite_summary)
 
-    def run_tests(self, tests_mapping):
+    def run_tests(self, tests_mapping) -> TestSuiteSummary:
         """ run testcase/testsuite data
         """
         tests = TestsMapping.parse_obj(tests_mapping)
@@ -195,7 +193,7 @@ class HttpRunner(object):
 
         if self.save_tests:
             utils.dump_json_file(
-                self._summary,
+                self._summary.dict(),
                 utils.prepare_log_file_abs_path(self.test_path, "summary.json")
             )
             # save variables and export data
@@ -207,7 +205,7 @@ class HttpRunner(object):
 
         return self._summary
 
-    def run_path(self, path, dot_env_path=None, mapping=None):
+    def run_path(self, path, dot_env_path=None, mapping=None) -> TestSuiteSummary:
         """ run testcase/testsuite file or folder.
 
         Args:
diff --git a/httprunner/v3/response.py b/httprunner/v3/response.py
index 57f47eae..01af0bd8 100644
--- a/httprunner/v3/response.py
+++ b/httprunner/v3/response.py
@@ -25,7 +25,7 @@ class ResponseObject(object):
             "headers": resp_obj.headers,
             "body": resp_obj.json()
         }
-        self.validation_results = {}
+        self.validation_results: Dict = {}
 
     def __getattr__(self, key):
         try:
diff --git a/httprunner/v3/runner.py b/httprunner/v3/runner.py
index 4de890d8..b426b2ea 100644
--- a/httprunner/v3/runner.py
+++ b/httprunner/v3/runner.py
@@ -1,4 +1,4 @@
-from typing import List
+from typing import List, Dict
 
 from loguru import logger
 
@@ -7,7 +7,7 @@ from httprunner.client import HttpSession
 from httprunner.exceptions import ValidationFailure
 from httprunner.v3.parser import build_url, parse_data, parse_variables_mapping
 from httprunner.v3.response import ResponseObject
-from httprunner.v3.schema import TestsConfig, TestStep, VariablesMapping, TestCase
+from httprunner.v3.schema import TestsConfig, TestStep, VariablesMapping, TestCase, MetaData
 
 
 class TestCaseRunner(object):
@@ -15,8 +15,8 @@ class TestCaseRunner(object):
     config: TestsConfig = {}
     teststeps: List[TestStep] = []
     session: HttpSession = None
-    meta_datas: List = []
-    validation_results: List = []
+    meta_datas: List[MetaData] = []
+    validation_results: Dict = {}
 
     def init(self, testcase: TestCase) -> "TestCaseRunner":
         self.config = testcase.config
@@ -92,8 +92,8 @@ class TestCaseRunner(object):
         finally:
             self.validation_results = resp_obj.validation_results
             # save request & response meta data
-            self.session.meta_data["validators"] = self.validation_results
-            self.session.meta_data["name"] = step.name
+            self.session.meta_data.validators = self.validation_results
+            self.session.meta_data.name = step.name
             self.meta_datas.append(self.session.meta_data)
 
         return extract_mapping
diff --git a/httprunner/v3/schema.py b/httprunner/v3/schema.py
index 41721a60..de2f144c 100644
--- a/httprunner/v3/schema.py
+++ b/httprunner/v3/schema.py
@@ -80,3 +80,74 @@ class ProjectMeta(BaseModel):
 class TestsMapping(BaseModel):
     project_mapping: ProjectMeta    # TODO: rename to project_meta
     testcases: List[TestCase]
+
+
+class Stat(BaseModel):
+    testcases: Dict
+    teststeps: Dict
+
+
+class TestCaseTime(BaseModel):
+    start_at: float
+    duration: float
+    start_datetime: Text = ""
+
+
+class TestCaseStat(BaseModel):
+    total: int = 0
+    successes: int = 0
+    failures: int = 0
+    errors: int = 0
+    skipped: int = 0
+    expectedFailures: int = 0
+    unexpectedSuccesses: int = 0
+
+
+class TestCaseInOut(BaseModel):
+    vars: VariablesMapping = {}
+    out: Export = []
+
+
+class RequestStat(BaseModel):
+    content_size: Text = "N/A"
+    response_time_ms: Text = "N/A"
+    elapsed_ms: Text = "N/A"
+
+
+class MetaData(BaseModel):
+    name: Text = ""
+    data: List[Dict]
+    stat: RequestStat
+    validators: Dict = {}
+
+
+class Record(BaseModel):
+    name: Text = ""
+    status: Text = ""
+    attachment: Text = ""
+    meta_datas: List[MetaData] = []
+    response_time: Text = "N/A"
+
+
+class TestCaseSummary(BaseModel):
+    name: Text = ""
+    success: bool
+    stat: TestCaseStat
+    time: TestCaseTime
+    records: List = [Record]
+    in_out: TestCaseInOut = {}
+    log: Text = ""
+
+
+class PlatformInfo(BaseModel):
+    httprunner_version: Text
+    python_version: Text
+    platform: Text
+
+
+class TestSuiteSummary(BaseModel):
+    success: bool
+    stat: Stat
+    time: TestCaseTime
+    platform: PlatformInfo
+    details: List[TestCaseSummary]