The invention discloses a thermal power plant safety production accident hidden danger troubleshooting, governing and managing system. The method comprises the following steps: discovering hidden dangers, establishing a troubleshooting report based on an excel server; filling Accident hidden danger simple questions, hidden danger information and possible results caused by hidden dangers in the report; carrying out department major assessment, assessing a hidden danger level by departments for a hidden danger type, performing checking by the functional department: checking the assessed hidden danger by the functional department, and treating the completed hidden danger according to the completed situation of the hidden danger treatment; recording the treated situation, the completed time and the treatment personnel, applying for acceptance check, performing acceptance check after the treatment is completed, and recording acceptance check suggestions, acceptance check application teams and acceptance check departments. According to the invention, online circulation of hidden danger discovery, verification and treatment can be realized, the progress can be checked in real time for each hidden danger, the treatment condition can be followed up, and closed-loop management is facilitated.