The invention discloses test adaptor (TA), test tool system (TS) composed of TA, and test method. Through network connection, TA as independent application program is connected to test executor (TE) dynamically in order to transfer test information. Structure of layered management is adopted in inner structure of TA. Through uniform interface, TA frame realizes management of common functions such as communication between TA and TE, configuration of protocol stack, as well as other common functions including message monitoring, and alarming etc. Through uniform interface, protocol stack manages protocol modules. Based on different test requirement, protocol modules can be combined dynamically so as to raise reuse of protocol modules. The invention ensures consistency and inheritability of development, and saves investment of development.