Project 5S+3 in Siam Materials Exchange Co., Ltd. is a project that was held for the purpose standardizes 5S+3 to occur in the personnel departments in the agency knowledge and attitude towards 5S+3. Which operates under the principles of 5S consists of Clearing Up, Organizing, Cleaning, Standardizing and Discipline. In the present, there are environmentally conscious more and the opening of the ASEAN community to come in 2015 AD. Making has developed a project 5S to 5S+3, Plus 3 is added by the environment, Strengthening the morale of the employees and ASEAN cultural aesthetic.The started the project from the set policy, select committee, divide the area of responsibility, the activities Big Cleaning Day Event and places in compliance with the standard. After the activity found. Each area has a tidy up and conducting a survey to assess the satisfaction of the 5S+3 personnel found. All levels of satisfaction at 4.37 out of 5 interpretation that the implementation 5S+3 was well.