1. A modeling system based on a logical relation, comprising: an operation task integrating module for dividing integrated operation tasks into different classes comprising adding operation objects, deleting operation objects and modifying operation objects; a task interpreter for acquiring command information of said operation task integrating module and performing task splitting on said command information; a graph layout correcting module for putting said operation objects on grid nodes by adopting rectangular lattice description, a graph wiring correcting module for wiring according to fewest crosses and shortest paths and correcting said associated objects on wiring paths; a database model increment correcting module for correspondingly performing model addition, deletion and modification actions according to the actions of said graph layout correcting module and said graph wiring correcting module; wherein, when one or more spatial point operation objects are newly added, the associated spatial points of the adjacent areas are required to automatically shift; said database model increment correcting module further comprises a graph increment calculating unit for calculating a current graph increment according to the actions of the graph layout correcting module and the graph wiring correcting module; a model increment calculating unit for calculating a current model increment according to the current graph increment acquired by said graph increment calculating unit; and a relational database for storing a grid model after the model increment corresponding to the graph increment corrected; said current graph increment comprises a grid primitive object increment and a topological relation change increment.