The invention relates to a testing system and method for the consistency of an IPv6 (Internet Protocol Version 6) protocol. The system comprises an accessing module, a parameter configuration module, a test case set selection module, a tested equipment configuration command module, a test executing module, a test result output module, an exception handling module and a configuration management module. The method comprises the following steps: (1) finishing all configurations needed by the configuration management module; (2) accessing IPv6 Protocol consistency testing equipment and to-be-tested equipment; (3) performing initializing operation and selecting a testing manner; (4) outputting a testing result. According to the testing system and method, the protocol consistency tests of different types of IPv6 equipment can be flexibly realized; manual testing or automatic testing can be supported at the same time so that the testing and the positioning are convenient; the testing system and method provide rich testing result items; testing results are convenient to check and recheck, and the problems are convenient to position; the testing system and method can be used for processing abnormal conditions to guarantee the stability of the system.