Prefabricated building-based attribute assignment method and apparatus

The invention discloses a prefabricated building-based attribute assignment method and apparatus. The method comprises the steps of receiving an instruction of inputting attributes of a current building unit in a BIM design model; calling a pre-established database, wherein the database comprises graphic data and attribute information corresponding to the graphic data; according to the type of thecurrent building unit, judging whether the graphic data matched with the current building unit exists in the database or not; and if yes, receiving an instruction of selecting a graph from the graphic data by a user, and assigning the attribute information corresponding to the selected graph to the current building unit. When materials, members or member sets in the BIM design model are processed, the information in the database can be called to automatically perform value assignment on the attributes, so that the workload and the error rate of process design attribute assignment are reducedand the problems of code i