Since Reunification，Macau’s Gini Coefficient has been declining，and household disposable income has been rising. The social security system in Macau has achieved balance，fairness and efficiency in the distribution of social resources. This article uses the evaluation framework of a social security system to analyse Macau’s current system from five dimensions：needs，coverage，effectiveness，sustainability，and coordination. Macau has already reached full social security coverage and effectively alleviated income disparity. However，due to aging of the population，demand for social security has increased. To achieve a sustainable development of the social security system，the Macau Special Administrative Region government has begun to adjust the appropriation system，strengthening investment income and introduced a non-mandatory central provident fund. In terms of coordination，it has initially focused on the division of labour and administrative structure，then on integrating functions and provided incentives to non-governmental organisations to develop social services. The orderly establishment and good functioning of Macau’s social security system is obvious to all，and the way forward should be to introduce innovation and entrepreneurship in the development of social services by integrating big data with services，stimulating inter-sectoral and regional cooperation from smart city development，and public-private partnerships. The social security system between Macau and the Bay Area should also be improved，and big data health industry should be encouraged.