Fault detection method and device

The invention discloses a fault detection method and device. A terminal device receives a fault detection instruction inputted by a user, and determines the business type to be subjected to fault detection according to the fault detection instruction; the fault detection content is determined according to the business type; the fault detection content is started to be detected to obtain a detection result; the detection result is displayed, so the fault detection instruction is directly triggered when whether the terminal device has a fault needs to be determined, no matter in a distribution stage or in an application stage of the terminal device; thus the fault detection content corresponding to the business type to be subjected to fault detection is detected; the self-detection of the terminal device is effectively realized; the fault positioning speed is increased; and the fault detection precision is improved.