.IT services outsourcing motives aroused the concern of many scholars at home and abroad, the paper-driven and theory-driven decision-making both summed up the IT services outsourcing motives. By comparing a variety of IT service outsourcing motivation theory, this paper argues the perspective of resource-based IT services outsourcing motives greater rationality. On this basis, it puts forward the enterprise of resources and flexible resources of rigid concepts. Alternative resource dependence theory, two kinds of resources, service outsourcing are discussed motivation. Finally, the outsourcing of IT services at different stages of life cycle development strategies.