The invention provides an equipment non-contact safety debugging and maintenance method and system. The method includes that according to the operation of the equipment debugging and maintenance, the master station sends orders by scheduling the data network and the wired communication network in a power station in the operation allowed time, and starts and allows the wireless debugging and maintenance operation of power secondary equipment; a maintainer performs the debugging and maintenance operation of the secondary equipment by connecting a portable device to the power secondary equipment through wireless communication authentication; and after the debugging is completed, the master station closes the wireless communication interfaces of the power secondary equipment by scheduling the data network and the wired communication network in a substation, and locks the wireless debugging and maintenance operation. By means of the wireless communication means, the method fully utilizes the existing data information technology to realize the maintenance and debugging of the equipment without entering the equipment interval, greatly enhancing the on-site debugging and maintenance safety and improving the maintenance efficiency.