| The prevalence and development of Internet and Electronic Commerce drives the construction and updating process of enterprise information system. To shorten the design and exploitation period for enterprise information system, cut down the cost of constructing enterprise information system and rapidly respond to varying commerce rules for previous systems, Sun constitutes the criterion of Java2 Platform Enterprise Edition (J2EE) and based on component .defines to devise, develop, deploy and assembly each component of enterprise application system.Power system is a more automatic industry of all. Its business needs all kinds of computer information system. To the characters and difficulties in power field itself, this thesis proposes that visual monitor system may adopt the scheme of component design based on EJB technology. Then we analyze and compare various popular standards of component technology in detail. And we prove the feasibility and advantage of EJB technology proposed by Sun in the practice. Also we extract reusable business logic existing in the safe visual monitor system. By using EJB technology, we devise, deploy and apply these reusable business logic to the whole system. Finally, we present the system with a integrate business frame.
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