This study examines the structural effects of three basic factors related to the tourist destination development(TDD), i.e. tourist demand, tourism supply, and destination community, on the Investment for the TDD and on the final implementation of the TDD. To achieve the above goal, theoretical model composed of three exogenous constructs dealing with three basic factors and two endogenous constructs including the variable of the TDD investment and the TDD implementation are proposed. 204 questionnaires from a survey of quota-sampled investment-concerned groups, public and private, linked with 23 tourist enclaves in Jeju Island was analyzed, and the proposed hypothetical model was validated with a structure equation modelling procedure by the LISREL program. From the result of structural equation model the study model developed in this article was supported.