diff --git a/integration_test/README.md b/integration_test/README.md
new file mode 100644
index 000000000..c2e4d3ff6
--- /dev/null
+++ b/integration_test/README.md
@@ -0,0 +1,23 @@
+# How to debug test cases?
+* start docker compose
+```
+./docker/start.sh
+```
+
+* deploy L1 contracts
+```
+# replace $taiko-mono with the taiko-mono repo path.
+TAIKO_MONO_DIR=$taiko-mono ./integration_test/deploy_l1_contract.sh
+```
+
+* show environment variables
+```
+# replace $taiko-mono with the taiko-mono repo path.
+TAIKO_MONO_DIR=$taiko-mono ./integration_test/test_env.sh
+```
+
+* copy the result of previous step and paste it into `Debug configurations`
+> after debugging, don't forget stop docker compose!
+```
+./docker/stop.sh
+```
\ No newline at end of file
diff --git a/integration_test/test_env.sh b/integration_test/test_env.sh
index 8ff64aa61..ec3e2ad1f 100755
--- a/integration_test/test_env.sh
+++ b/integration_test/test_env.sh
@@ -21,3 +21,25 @@ export L1_SECURITY_COUNCIL_PRIVATE_KEY=0xdbda1821b80551c9d65939329250298aa3472ba
 export L1_PROPOSER_PRIVATE_KEY=0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80
 export L1_PROVER_PRIVATE_KEY=0x59c6995e998f97a5a0044966f0945389dc9e86dae88c7a8412f4603b6b78690d
 export TREASURY=0x1670010000000000000000000000000000010001
+
+# show the integration test environment variables.
+echo "TAIKO_MONO_DIR=$TAIKO_MONO_DIR"
+echo "L1_NODE_HTTP_ENDPOINT=$L1_NODE_HTTP_ENDPOINT"
+echo "L1_NODE_WS_ENDPOINT=$L1_NODE_WS_ENDPOINT"
+echo "L2_EXECUTION_ENGINE_HTTP_ENDPOINT=$L2_EXECUTION_ENGINE_HTTP_ENDPOINT"
+echo "L2_EXECUTION_ENGINE_WS_ENDPOINT=$L2_EXECUTION_ENGINE_WS_ENDPOINT"
+echo "L2_EXECUTION_ENGINE_AUTH_ENDPOINT=$L2_EXECUTION_ENGINE_AUTH_ENDPOINT"
+echo "TAIKO_L1_ADDRESS=$TAIKO_L1_ADDRESS"
+echo "TAIKO_L2_ADDRESS=$TAIKO_L2_ADDRESS"
+echo "TAIKO_TOKEN_ADDRESS=$TAIKO_TOKEN_ADDRESS"
+echo "ASSIGNMENT_HOOK_ADDRESS=$ASSIGNMENT_HOOK_ADDRESS"
+echo "TIMELOCK_CONTROLLER=$TIMELOCK_CONTROLLER"
+echo "ROLLUP_ADDRESS_MANAGER_CONTRACT_ADDRESS=$ROLLUP_ADDRESS_MANAGER_CONTRACT_ADDRESS"
+echo "GUARDIAN_PROVER_CONTRACT_ADDRESS=$GUARDIAN_PROVER_CONTRACT_ADDRESS"
+echo "L1_SIGNAL_SERVICE_CONTRACT_ADDRESS=$L1_SIGNAL_SERVICE_CONTRACT_ADDRESS"
+echo "L1_CONTRACT_OWNER_PRIVATE_KEY=$L1_CONTRACT_OWNER_PRIVATE_KEY"
+echo "L1_SECURITY_COUNCIL_PRIVATE_KEY=$L1_SECURITY_COUNCIL_PRIVATE_KEY"
+echo "L1_PROPOSER_PRIVATE_KEY=$L1_PROPOSER_PRIVATE_KEY"
+echo "L1_PROVER_PRIVATE_KEY=$L1_PROVER_PRIVATE_KEY"
+echo "TREASURY=$TREASURY"
+echo "JWT_SECRET=$JWT_SECRET"