System and method for developing target application on target system in cross development environment

Disclosed is a system for developing a target application on target system in a cross development environment having a host system and a target system, the development system including: the target system having: a storage device; an input device; an output device; a source editing unit for creating, opening, editing, and saving a source program to the storage device; and a project management client unit for performing a function of creating, opening, modifying, building, executing, and closing a project, and controlling data transmission/reception and information storage; the host system having: a storage device; a cross compiling unit for building (cross-compiling and linking) the source program such that an executable program is created to be saved to the storage device, and transmitting a message of a building result to the project management server unit; and a project management server unit for storing the project information and the source program in the storage device of the host system, and performing a build function of the source program.