The study aimed to analyze refuse derived fuel at Phuket sanitary landfill including the study of heating value and economic viability of RDF production as the alternative solution for solving Phuket's solid waste problem. The solid waste from Phuket sanitary landfill were sampled for 200 kg then processed through mechanical-biological treatment for 1 and 4 months. Then the processed waste from two experiments were tested with a bomb calorie meter according to ASTM D 5965-07a Standard. The economic analysis was carried to find the net present value, internal rate of return, and benefit-cost ratio. They found that the processed waste of 1 and 4 months have heating values of 4,888 and 6,568 kcal/kg respectively. This results confirmed that the solid waste from Phuket sanitary landfill can be used as fuels. The processed waste from 1 month was more appropriate for Phuket because of the limitation of space. This finding would be useful as a guideline for solid waste problems in other places.