The invention discloses an online joint debugging system and method for a power safety and stability control device. The system comprises a stability control center device, a controller, an audio recognition module, a strategy machine management module and a report automatic generation module; the output end of the stability control center device is connected with m substation devices; each substation device is connected to n execution station devices. According to the system and method provided by the embodiment of the invention, an adaptive compensation process is set in the system, test reports are synchronously completed by real-time communication and sharing of information between a master station device and the substation devices, the work efficiency is improved, safety risks are reduced, the accuracy of the stability control center device is effectively improved, and the problems of accuracy and stability in the debugging process are solved without increasing the cost.