City integration is the inherent demand on account of divergence of regional development and overlapping city functions. Los Angeles，London and Tokyo provide us some analytic samples of city integration of metropolitan cluster. There are some advantageous conditions such as natural，historical，cultural，economic，market system，infrastructural，city planning，industrial，and so on，for regional cooperation and development in city integration between Guangzhou and Foshan，but their governance still run respectively and some uncoordinated factors still exist between both cities. This paper put forward a few proposals including market orientation，planning coordination，divergent industrial development，ecological integration construction，large market circle，coordinative system and so on. Also，it provides prediction of the city integration on three tiers. <<