Failure reminding method and system and air conditioner

The invention provides a failure reminding method, a failure reminding system, an air conditioner, computer equipment and a computer readable storage medium. The failure reminding method includes thesteps of judging whether the air conditioner has a failure; judging whether the air conditioner is in a startup mode or not when the air conditioner has a failure; and according to judging results, controlling a display device of the air conditioner to carry out failure reminding according to corresponding display modes. After it is detected that the air conditioner has a failure, failure reminding is carried out by the display device according to the corresponding display modes and the on-off state of the air conditioner, so that the problems that in relevant technologies, failure reminding cannot be carried out after the air conditioner is turned off, and consequently a user cannot find failures in time and cannot repair the air conditioner in time are solved; and failure reminding of different modes can be prov