Although we can use telecomm technologies such as MMS to access various services, right now we do not have a good method to access several services at a time. In this paper, we propose a Service-based P2P Mobile Sensor Network (SPMSN) architecture. It allows users to adopt an integrated method to access various services even these services are not in the same physical network. An efficient communication mechanism based on XML is used between service nodes in SPMSN to allow people use various services easily. We also build a security system to show how to adapt SPMSN architecture in a real case.