The invention relates to a fault self-diagnosis method and device for a hospital fan coiled tube and a readable storage medium. The fault self-diagnosis method for the fan coiled tube comprises the steps that environment parameter information and current operation parameter information of the fan coiled tube are obtained; based on the current environment parameter information and the environment parameter information at the last moment, the change rate of environment parameters of the fan coiled tube in the preset time is calculated, wherein the preset time is a time interval between the current time and the last moment; if the current environment parameter information, the current operation parameter information and the change rate of the environment parameters meet the first preset condition, or the current environment parameter information meets the second preset condition, a control signal is generated; and fault alarm is triggered according to the generated control signal. Through implement of the fault self-diagnosis method and device for the hospital fan coiled tube and the readable storage medium, the fan coiled tube can be automatically subjected to fault forewarning so as to make adjustment in time to guarantee the air conditioner comfort and improve the energy efficiency.