Accurate and unique sensor node identifier encoding will be an important factor to ensure the application of Wireless Sensor Network (WSN) identifier. Therefore, in order to detect the conformity of the WSN identifier encoding, the design and implementation of a WSN identifier encoding conformance test system based on web are presented. The WSN identifier encoding conformance test system consists of test method, system function, and test architecture. System function includes executable test suite (ETS) generation function, the test preparation function, the test execution function, the test response information analysis function and the test analysis function. For rapid conformance and credibility of the test system, we designed the conformance test software which consists of test server and test router. The design of test server includes man-machine interface, application service components, supporting service components and system management. The design of test router includes data communication layer management, test execution management. The implementation of test system mainly including the dataflow of test system and implementation process of test server. Verification of the test system comprises ETS verification and the test execution result verification. Additionally, the WSN identifier encoding test specifications was formulated according to the design of test system. The test results demonstrate the effectiveness of the test system by testing the sensor nodes in WSN.