In order to construct a function model of community health service (CHS) information for development of CHS
information management system, Integration Definition for Function Modeling (IDEF0), an IEEE standard which is
extended from Structured Analysis and Design(SADT) and now is a widely used function modeling method, was
used to classifying its information from top to bottom. The contents of every level of the model were described and
coded. Then function model for CHS information, which includes 4 super-classes, 15 classes and 28 sub-classed of
business function, 43 business processes and 168 business activities, was established. This model can facilitate
information management system development and workflow refinement