Abstract: There is disclosed a cellular phone installation adapted to capture and view image while providing telephone communication service simultaneously and a design method of implementing the same. While a cellular phone installation is used to capture or view images, an interrupt control unit is forced to intercept the transmission between a digital baseband processing unit and a display module for driving a image capture processing module to transfer the captured image and display the captured image on a display module. In this manner, the cellular phone installation is able to conduct telephone communication in the middle of image capture or viewing, and the convenience of using the cellular phone installation is improved.