1. CONTENTS (1) RESEARCH OBJECTIVES The purpose of this study is to research the practicality of the mixed developing method in land development system. (2) RESEARCH METHOD This study is focused on case-study analysis. The data for this analysis were collected from the actually developed site(Kimpo Kocheon). This study approached on the comparing with three developing methods through an application of the expropriation, the replotting and the mixed developing system in a site. (3) RESEARCH FINDINGS In the results of this profitability ratio, the mixed developing is 1.33, the expropriation is 1.27 and the replotting is 0. Of course, this is the result of a sample analysis. 2. RESULTS Interest regarding the mixed developing is recently increase through folllowing disadvantageous things such as the inhabitant migration of the expropriation and the privatization of developing profit of the replotting. This study offers two meaningful items of mixed developing system in land developing market. 1) In the respect of an operator, the mixed developing system can be insured the profit. 2) In the respect of a land owner, the mixed developing system can be also guranteed the developing gain.