The invention discloses a method and a system for site quality acceptance management of an electric power engineering project. The method comprises the following steps: a site acceptance personnel collects site quality data of items to be accepted by using a mobile terminal preset with a unified quality acceptance and evaluation standard, and performs acceptance evaluation on the items to be accepted; Transfer the collected site quality data and the corresponding evaluation results to the background server for the project quality inspection person in charge to check the implementation of acceptance work and feedback the acceptance work problems and the corresponding project rectification opinions; The on-site acceptance personnel shall, according to the received feedback acceptance work problems and the corresponding project rectification opinions, request the items to be accepted to make corresponding rectification, and feedback the rectification situation of the items to be acceptedby the mobile terminal. The invention realizes the on-site operation truly through the on-site operation of the mobile terminal, eliminates the phenomenon of 'two skins', makes the on-site operation control of the capital construction in place, executes each link according to the standard, and ensures the safe and high-quality construction of the engineering project.