We propose the Network Service Platform (NSP) as a framework which enables the development of integrated services between three service fields: Internet Services, Robot Services, and Ubiquitous Computing. In this paper, we outline the development of a Home Security Service Robot System, a prototype service which integrates Internet and Robot services using the NSP framework. In this prototype system, the robot monitors the home and uploads image and motion detection data. The server on the Internet stores these images, allows human face recognition and email notification, and provides user consoles for controlling and browsing functionalities from a web browser. We also discuss the possibility of providing integrated services using the NSP framework based on the results of our implementation.