Regional development planning of risk type, which is called risk planning in short, is considered as a new management pattern of planning. When implementing it, the development and the harmony among economy, society, population, resources, and environment in a certain space and at a certain time should be arranged, all the risks that may come out should also be undertaken, then measures should be taken to solve all the problems, and the synthetical benefits after implementing the risk planning can also be shared. Under the market economy of the social democracy, risk planning should be advocated in order to improve the quality of formulating and implementing the planning, remedy all kinds of pathologies step by step, strengthen the control of the whole process, and obtain the best synthetical benefits in implementing it. Beginning with the conception and the rise of risk planning, the authors discuss the creation of the bid, bargain, blind checkup, decision making, insurance, marketing, holding values and increment of risk planning, as well as the management pattern. In order to implement a risk planning successfully, it is suggested that the legislation guaranteed system, the investment fund system, the public consultation and supervisal system, and the occupation system of risk planning should be constructed. Finally, taking the economic and social development planning of Zhanyi County, which is located at the headstreams of Zhujiang River, as a case study, the authors analyze the whole process of formulating and implementing the risk planning of Zhanyi County, such as compiling the bid book of the risk planning and organizing the bid, endorsing the bargain and implementing the risk planning according to it, compiling the process verbal of the risk planning and consulting the public, organizing the blind checkup, the final examination and the appraisal of the risk planning, tracing the decision making and the implementation of the risk planning, making the risk planning hold its value or even get increments, and so on.