Fault early warning method, charging pile controller, control system and charging pile

The invention discloses a fault early warning method, a charging pile controller, a control system and a charging pile, and the method comprises the steps: obtaining first actual measurement data corresponding to the charging pile, and comparing the first actual measurement data with a fault early warning condition corresponding to at least one fault early warning type, the method comprises the following steps of: comparing first measured data with a fault early warning condition corresponding to at least one fault early warning type so as to evaluate whether the charging pile has a potential fault risk or not from fault early warning strips corresponding to different fault early warning types; if yes, determining that the target early warning type is a fault early warning type corresponding to the fault early warning condition, executing a fault early warning operation corresponding to the target early warning type to achieve the purpose of fault early warning, reducing the fault rate of the charging pile, o