The invention relates to the technical field of operating systems. Provided are a method, device and system for calling an operating system library. The method comprises: (101) receiving, by an execution domain, a memory access address of an application executable file transmitted by an administration domain, wherein the execution domain comprises one or more processors for running the application executable file, and the memory access address of the application executable file is an address of the application executable file stored in an memory of the execution domain; (102) running, by the execution domain, and according to the memory access address of the application executable file, the application executable file; (103) acquiring, by the execution domain, a memory access address of a dynamic operating system library when running the application executable file to call the dynamic operating system library; and (104) calling, by the execution domain, and according to the memory access address of the dynamic operating system library, the dynamic operating system library. The invention can prevent redundant storage.