PURPOSE: A moving robot exploration system founded the distance information is provided to search ambient conditions by generating topological map through extraction of node information. CONSTITUTION: A camera unit(100) receives the image of an external surrounding environment. A manipulator(210) performs an external operation. A distant sensor(220) inputs the distance information of the ambient conditions. A database stores an object model for objet recognition. A map generator uses the distance information inputted from the distance sensor and creates a global topological map.