Slum in the Thailand has the debt problem. Since, most people in the slums can make money day and use disappear in day that. Therefor they are money to save. When the problem requires money. Most people will must go to borrow money. When the interest rate on the loan has to be expensive. Such as borrow 100 bath interest equivalent to 20 bath. The 100 bath it has only 80 bath another 20 bath to deduce as soon as and must to pay all principle until to fully. People in the community have suffered. These problem are found almost everywhere in slum. That have effect of poverty, it is the stratification (rich, poor) , people are not as healthy preventive and reduce the performance, the economic inequality lead to social problem such as burglary, the society are economic weakness and political, instability in the economy, society, and political, And the development to eradicate poverty. First, economic development , economic growth, and economic stability. Second, human resource development, quality of life, and environment. The changing from economic, agriculture to industrial economics. Third, rural development, system administration the decentralization of administration .reral development to provincial .raise revenue and employed in rural. Finally, The development of the urban poor . developed in term of revenue, stability of occupation, and housing supply.