The general demand factors of the RHQs of MNCs to the host cities ' synthetic environment in-clude : market factors，human capital factors，financial factors，infrastructure factors and policy factors. The best environmental advantageof ShanghaiforattractingRHQs is theproximitytoclients andmarkets； butthebestenvironmentaladvantageof HongKongandSingaporearelowoverall taxburdenandhighde-greeoftradefacilitation. Therefore the countermeasures for building a headquarters economyenvironment in Shanghai is to avoid weaknesses，further strengthen the market advantage and format competitive dif er-entiation with Hong Kong and Singapore.