Based on macroeconomic data of Shanghai in 2018 and before that，and from the perspective of high-quality development，we analyze current and past economic situation of Shanghai. The research shows that Shanghai’s economic structure tends to be high-end，its economic efficiency steadily improves，and consumption contributes more to economic growth；the probability of GDP growth in 2018 is lower than that in the last year；the probability of being in the baseline scenario in 2019 is 65.5%，and its GDP remains at the level of 6.5%. In view of the internal and external environment，we put forward that economic development depends on promoting domestic demand in the short term，however technological innovation and institutional innovation is very crucial in the long term，consolidating the real economy，further creating a good business environment，building a new open economic plateau，and promoting Shanghai’s economic development to a higher quality.