In 2017，the recovery momentum of the world economy exceeded the expectation. Against this background，China’s economic growth has steadily increased and the quality of its growth has further improved. Under this favorable environment both at home and abroad，Beijing’s economic growth rate has remained moderately stable，and a “soft landing” form has taken shape. Investment in fixed assets has increased steadily，investment structure has become more rational，consumption structure has been further optimized，online shopping and consumption have grown at a rapid rate，emerging industries have grown rapidly，the proportion of GDP in the city has continued to increase，price indices have risen slightly，moderate inflation has contributed to economic growth，and incomes of urban and rural residents have increased. To achieve steady growth，medical and consumer spending has rapidly expanded. Based on past research results，the three key factors for improving Beijing’s innovation capabilities are analyzed using mathematical-economic models：market size，industrial structure，and general technology. Focusing on relieve non-capital functions，the difficulties and misunderstandings in Beijing’s “urban function conversion” were empirically analyzed. Aiming to the practical issues in the economic development of Beijing，the strategic objectives and strategic path of Beijing’s construction of a modern economic system were analyzed. Finally，the article forecasts Beijing’s economic situation in 2018.