As a part of certain region, agricultural development has inevitable connection with regional urbanization, and they are highly heterogeneous and complementary in space. Their internal relationship is manifested as agricultural structure suits demand of urbanization development through adjustment in the process of urbanization, while urbanization is based on development of regional agriculture. From history of world agriculture and urbanization development, agriculture firstly provides primitive accumulation for urbanization development, and drives regional urbanization through promoting agricultural development. When urbanization develops to certain stage, urbanization accumulation increases and reaches the goal of “boosting urbanization through agriculture”. If urbanization develops slowly, agricultural adjustment will lack motive force. On the contrary, weak agricultural development will lead to stagnation of urbanization. Therefore, adjustment of agricultural structure and urbanization development are interconnected, mutually promoted and restricted, and interdependent.