The paper analyses the different features of two major types of convention tourism market — association conference and corperation meeting,and further expounds the promotion strategies in accordance with the market.

We propose a top-down design approach which specify desired global behaviors with a conversation protocol,after we analyzed the drawback of the bottom-up approach,and then verify whether the global protocol satisfy the preset system goals.

On the basis of analysis of features of Web service,this paper takes the example of BPEL4WS language to introduce the conversation protocol based on colored Petri net and corresponding method for Web composition service designing.

The notion of conversations,and their associated conversation protocols,as abstract representations to be used to characterize interaction between agents has been discussed in the agent community for several years now.

The interactive process of the system is analy zed in detail and some key problems are studied, such as construction of knowle d ge base, cooperative session management, parameterization of VRML model and et c.