The invention discloses a power equipment state maintenance method based on 4G wireless communication. An intelligent terminal based on a 4G wireless communication technology participates in power equipment state maintenance and power equipment full-cycle management. First of all, the intelligent terminal is connected with a 4G network for accessing an external-network server through a tablet computer, standard management of onsite operation of power equipment state maintenance and full-cycle management and the like is realized, and fusion with background data is realized in real time during the operation through the 4G network. The intelligent terminal with a 4G communication function, provided by the invention, can realize rapid check of power equipment machine account information, can provide power equipment operation state monitoring data and operation environment monitoring data in real time, and serves for full-cycle management work of power equipment.