It is difficult to users searching information because of the rapid expanding of information resource in Internet. Traditional search engines can?t deal with that very well. To aim at the problem, the paper presents Agent, meta-search engine and active services technologies, and makes sure that the combine of them can fit for the demands of personalize and intelligent when users searching information. The article advances a system of intelligent meta-search engine system based on Agent, expounds mainly the work principle of the user interface Agent module. In addition, the article discusses some key technologies of the module such as mode choice and interface embodiment at length.