This study sees that improving licensed real estate agents’ ethics can influence the expertise and trust of real estate business and people. To verify this, the study formulates a study model and model hypotheses and analyzes causality. The basic data of a survey go through exploratory factor analysis and simple regression analysis with SPSS 12.0. According to the results, improving the employees’ ethics (t=12.718, t=11.877, p=.000), improving the ethics among licensed real estate agent members (t=12.185, t=11.263, p=.000), improving licensed real estate agents’ service ethics for the clients (t=13.131, t=11.801, p=.000), and constantly improving the ethics of licensed real estate agents for the people (t=13.766, t=14.882, p=.000) lead to the qualitative improvement of licensed real estate agents’ expertise and credibility.
To present the results of the research as the suggestions, the current certified real estate brokers act and ethics charter of the Korea Association of Realtors (code of ethics) were established to four directions of employment ethics (employment of employees and observance and supervision of rules and code of ethics by the employees), organization ethics (prevention of excessive competition among real estate brokers, reflection of accurate price for real estate advertisement,, and respect of exclusive listing contract), service ethics (observance of legal brokerage, report of expectation from the clients and flaws found by checking and confirming the articles), and public ethics (fair attitude to consumers, service based on sound thinking, steady research and efforts to maintain the real estate agents' dignity and get knowledge related to brokerage) respect of exclusive listing contract), and these directions should be complemented.