The embodiment of the invention discloses a wind turbine generator system, a safety protection control method, a control device and a storage medium. The wind turbine generator system comprises blades, a hub, a cabin, a tower, a control device, a first alarm, a second alarm and multiple signal triggering devices. The control device receives an instruction for starting debugging of an electric control system for the blades sent by the debugging personnel, counts the number of received trigger signals sent by multiple signal trigger devices and sends a first alarm signal and a second alarm signal if the counted number is greater than 1. According to the wind turbine generator system, the safety protection control method, the control device and the storage medium, the occurrence of safety risks can be prevented by detecting the state of an impeller locking device of the wind turbine generator system, the state of the signal triggering device of each blade, the pitch angle of each blade and the current wind speed and further sending an alarm signal to prompt the debugging personnel when the debugging environment is dangerous and rescue the debugging personnel.