Abstract: AEC CAD should provide the capability of customization to meet the increasing needs of diversified projects and adapt to various kinds of standards and routines applied in different industries and enterprises. Based on the various concepts of templates being promoted and applied in recent years, the paper brings forward a schema for implementing customization-oriented template technology: (1) Referring to the functional requirements decomposition tree, functional patterns addressing the requirements of multiple users are extracted. (2) An hierarchy of multi-level engineering information system to facilitate the analysis of corresponding modules is constructed. (3) Multi-view templates are worked out for each kind of particular modules so as to realize seamless integration of customized objects with the system as well as to ensure the capability of customization and reuse of AEC CAD. At last, the application of template technology to various software products of PDSOFT is introduced.