Aiming at the problem of rapidly growing and frequently changing requirement for risk map generation of immovable cultural heritage， and existing programs and tools cannot meet the needs of actual applications， a method for constructing semantic model was proposed. Based on the semantic model， a Domain-Specific Language （DSL） close to natural language was designed for experts in the field of immovable cultural heritage. Firstly， a business model was extracted by conducting in-depth research on various indicators of immovable cultural heritage， as well as methods and processes for generating risk maps. Secondly， the meta-calculation units of the risk value calculation rules were abstracted， and a semantic model was constructed by analyzing the business model. On this basis， a DSL that can express all semantics in the semantic model was designed. The language script can be programmed by the field experts themselves and used to quickly and efficiently generate risk maps. It is easy to expand and can meet the needs of frequently changing requirements. Compared with the mainstream method of generating risk maps by using Geographic Information System （GIS）， the use of DSL to generate risk maps can reduce work hours by more than 66.7%.