Abstract: Software project often faces the problem that projects out of control and deviating from the anticipated objective. This study proposes an innovative objective monitor method that can provide software project managers with real-time monitor of March objective (the quantity of objective consumed gradually with the project going) and research personnel activities. To obtain real-time and comprehensive state of software project March objective, grid management is used to divide the project monitor grid in three dimensions: level, milestone and objective. Then, a detailed supervision mechanism is designed to analysis objective deviation level through buffer analysis. A real software project is selected as an example to illustrate the grid structure design process and the buffer analysis method used to measure the deviation level.