To upgrade the emergency management platform from its traditional role of information management to the intelligent process role of information, the massive knowledge about emergencies must be integrated. To better manage and use the emergency knowledge, it is necessary to build a knowledge database system based on the information technology. In view of the characteristics of knowledge in the field of emergency, the overall system objectives and the function requirements of the emergency knowledge database are proposed. The structure of the system is also provided. Meanwhile, the microcosmic and macroscopic principals for the system design are discussed. Based on the system goals and the design principles, some organization and unit models for the knowledge database are recommended. Each knowledge unit is composed of four elements, i.e. the laws and regulations, the technical specifications, the emergency knowledge and the inference rules. The organization mode is of four major categories and of three-layer. The top four major categories are the natural disasters, the accidents, the public health incidents and the social safety events. The types and the numbers of sub-classes of the middle layer are determined according to the specific situation of the province. The lowest level of the organization is every single knowledge unit. Combined with emergency management and the database technology, the method of the implementation of the knowledge database is proposed from the perspective of the software development. The database system is based on the MVC three-layer structure. Finally, based on the above design and analysis, a basic prototype of the system is proposed.