The invention provides a building project construction quality management system. The building project construction quality management system comprises a system management background and a mobile phone terminal which are managed by a server, wherein the system management background and the mobile phone terminal perform data transmission through a network; The system management background is used for receiving data transmitted by the mobile phone terminal, performing management and analysis on the data and sending an instruction to the mobile phone terminal at the same time; the mobile phone terminal comprises a user selection module and a construction quality management module, and the user selection module comprises an organization selection module; the construction quality management module comprises a problem checking module and a problem recording module, the problem checking module performs photographing and recording on the construction site through a camera of the mobile phone terminal, explains photographed pictures and then stores the pictures in the problem checking module, and finally the pictures are uploaded to the system management background through a network transmission module of the mobile phone terminal. The building construction quality management system and method provided by the invention solve the defects of long problem rectification period, unclear responsibility and incomplete data in traditional quality management.