Taking advantage of AGV omni-directional mobile feature, which can move independently in the three directions of front-back, right-left and zero radius rotation, based on the application of intelligent parking garage scene, choosing AGV as controlled object, the core modules of scheduling system--path-planning algorithm, digital map modeling, obstacle avoidance of running and database designing, was studied in detail. The design and implemetation of each module of the scheduling system and the software framework are given in this article. At the same time, one-lane road design pattern and two-lane road design pattern are compared. Based on the classical A_^* algorithm, by adding turning factor, a new path-planning algorithm is proposed, which making the number of turns of the planning route least, the AGV walking smoother and the system more efficient, when the starting point and the target point are determined. Through the actual test, the basic functions of the scheduling system are verified completyly.