The invention provides a problem solving/supervision method/system for an onsite project, a supervision method/system for the onsite project, a storage medium, and a terminal. The problem solving system of the onsite project comprises a problem creating module which is used for marking a projection problem on a building model, starting a problem event input interface through capturing an image of the building model marked with the projection problem, inputting the information data related with the project problem through the problem event input interface, and generating a problem event. According to the invention, the system can enable a construction manager to be personally on the scene, is better in experience, improves the management efficiency of a constructor, and achieves the paperless project management.