While crowdsourcing is developed as a business model, it has become a new method of information exchange under the development of mobile Internet and SNS, and promoted the method of information production and exchanging on Internet. During the processes of global huge disaster relief, mass of information released by normal people have been applied and played an important role. Using crowdsourcing in the disaster relief can improve the efficiency of disaster information's collection and rescue effect. Based on the analysis of current status of disaster relief and crowdsourcing model, this paper analyzed the whole lifecycle of disaster information: production, propagation and Consumption, and studied the feasibility and key issues of applying crowdsourcing in disaster information management and disaster relief. On this basis, the paper studied the crowdsourcing-compatible disaster & emergency management system, including its' content and architecture. It showed that involving crowdsourcing into DI management and disaster relief can be implemented if deep interaction is applied with SNS system, and also raised a number of issues that require further study.