Bay Area Economy is not only a special economic form that’s generated from the combination and fusion of the metropolitan area in port city and the particular topography of the bay area，but also a special economic form that’s formed from the high integration of port economy，agglomeration economy and network economy，which is mainly featured with opening，innovation，habitability and internalization. With reference to the successful experience of international famous bay areas，the bay area economy in Shanghai requires for overall regional planning，the establishment of regional cooperation，and the effective integration of government control and market mechanism functions. The integrated development of northern and southern parts in the bay area of Hangzhou Bay shall be initiated in proper time and the transformation and upgrading of the “mini” bay area along Huangpu River shall be promoted in a small scale according to the quick promotion method in Guangdong-Hong Kong and Macau Bay Area.