1. CONTENTS (1) RESEARCH OBJECTIVES This study has intended to present the improvement measures of ‘land lease·building sale’ - based housing policy. (2) RESEARCH METHODS To reach this goal, this study elicited the alternatives of improvement measures through case studies and literature reviews related to the issue. This study has employed expert survey method to evaluate the suitability of the elicited alternatives, and factor analysis to find improvement measures using explanation power and to classify the measures found. (3) RESEARCH FINDINGS This study has found 5 factors as the improvement measures of 'land lease·building sale'-based housing policy. 2. RESULTS This study has found the improvement measures of 'land lease·building sale'-based housing policy as follows: 1) housing plan and welfare (eight measures including homeless people, new town development, etc.), 2) tax and sale system (six measure including disclosing the original user cost, tax and fee reduction, etc.), 3) housing supply base (five measures including contract renewal, land lease housing supply, etc.), 4) financing and residential environment (six measures including using an annuity and treasury bond, loosening floor space index and strengthening the building-to-land ratio, etc.), and 5) rent diversification (two measures including dual land rent system, ensuring the right of repurchase).