Based on the data of resources, environment and foundation of production, applied prin-cipal components analysis and cluster analysis,the maritime space of Chang Shan islands are divided into three regions of agricultural-pasturalization: 1. The region of agricultural-pasturalization of the northern part of maritime space of Wang Jia and Shi Cheng islands, The main productions are cultivation of prawn and mullu-scs of seabeach, shallow sea float raft culture of mussel and scallop, and breed of sea cucu-tuber in submarine. 2. The region of agricultural-pasturalization of the middle western part of maritime space of Da Chang Shan, Guang Lu and western part of Xiao Chang Shan islands. The main producti-ons are shallow sea fload raft culture of mussel and scallop, breed of sea cucumber and scallop in submarine, proper development of molluscs of seabeach, and cultivation of prawn and algaes. 3. The region of agricultural-pasturalization of the southeastern part of maritime space of the eastern part of Xiao Chang Shan island, Hai Yang and Zhang Zhi islands. The main productions are shallow sea float raft culture of chlamys farreri gulf scallop development of pattnopecten yessoenis, and breed of abalone, sea cucumber, algaes and fish.