Abstract: Service-oriented coordination mechanism is adopted during the process of constructing IADS (Intelligent autonomous decentralized system) and thus an SMGIAC (SoftMan group intelligent autonomous coordination) model is proposed. Services community integrated with GP (Global planning), role-based service discovering/binding strategy is applied to constructing the service-oriented tuple space to provide an identical service interface for group cooperation. According to the current practical requirement of gas fields pipe-net scheduling, the mathematic modeling method of SMGIAC, its coordination decomposing lemma and relative concrete solvent for constructing sub-services (flows) are put forward. The experiment comparison results show that the total scheduling nicety degree of SMGIAC makes more biggish improvement than those of existing case-based matching and experts reasoning, and also SMGIAC overcomes the shortcomings of ReO such as inconvenient use, time consuming during scheduling plan of gas field pipe-net.