This study is implemented on secondary data analysis using information from Vietnam Living Standard Surveys for the period 2002-2012. Methods: Analysing some factors effect on demands and needs for healthcare, in which there are some factors of income, health seeking behaviour and health expendicture. The elasticity index between households income and health expendicture are used to estimate demands and needs for healthcare. Analyzing the correlation between revenue, health spending and the rate of out-patiens and in patients treatment to estimate health service utilization at health facilities. Results: 8-time increase of household earning leads to change health seeking behaviour, mainly increase health service utilization at government hospitals that results in 3-time increase of health expendicture and 2.1-time increase of health service utilization, consequently makes hospital overload. Recommendation: The method can be considered an approach to build health policies.