The invention is applicable to the technical field of fault maintenance, and discloses a remote guidance method and system for a maintenance site. The remote guidance method comprises the steps: collecting the site information of the maintenance site, and generating a virtual scene image of the maintenance site according to the site information; obtaining coordinate information of a fault point, adding fault marking information input by a user at the fault point according to the coordinate information of the fault point, and sending the virtual scene image added with the fault marking information and the current site view angle information to a guidance terminal; and receiving the guidance marking information, the coordinate information of the guidance marking information and the guidanceview angle information sent by the guidance terminal, adding the guidance marking information to the virtual scene image of the maintenance site according to the coordinate information of the guidancemarking information and the guidance view angle information, and displaying the virtual scene image added with the guidance marking information. According to the invention, the guidance terminal cangive guidance suggestions after the on-site condition is clear, and the guidance effect of remote guidance can be improved, and the on-site maintenance efficiency is improved.