Mobile agent provides a way to think about solving software problems in a networked environment that fits more naturally with the real world. Mobile agent technology can make distributed systems more adaptable to application needs especially in mobile environment. The use of mobile code makes distributed supervisor systems and the abstractions they provide more flexible to build and use. This paper explains how mobile agent meets the requirement of monitoring activities deployed over J2ME platforms. The architecture of such application is presented and the monitoring of activities, based on the Jini framework and some mobile patterns