The incentive mechanism based on electronic money, a common method in the field of information network, plays an important role in promoting the resource sharing, stimulating crowd sensing and promoting cooperative communication, and it is the key to improve the quality and efficiency of information network service. This paper summarizes the existing work of the incentive mechanisms, describes the objectives and challenges of the incentive mechanism, and focuses on the incentive mechanism on a trust center and the distributed incentive mechanism based on the block chain. It also discusses the security, credibility, privacy protection and extensibility of incentive mechanism based on electronic money.