The invention discloses a management and control system for the preliminary work schedule and achievement management and control system of a power grid planning project. The management and control system comprises a client side and a server side, wherein the client side and the server side are connected through a company local area network and/ or the internet; the server side comprises a deployment system data server and a system application server, wherein the deployment system server finishes the storage and the access of the preliminary work data of the power grid planning project; the system application server comprises functional modules including preliminary plan management, feasible organization management, feasible reply management, approval reporting management, project approval management, working monthly statement management, work schedule tracking, comprehensive information query and the like, preliminary plans finish being imported and are automatically distributed to each subordinate department, and the subordinate department fills in the feasible compilation, the feasible appraisal, the approval reporting and the project final approval work of each project according to project information; the finishing time of the plan is automatically recorded, a working achievement is stored, and the data of a whole process is subjected to statistic analysis so as to realize the whole process management and control of the work.