In this research, the air flow of an air-conditioner is quantified and it is the purpose to save the energy by searching for an optimal conditions which are supply air velocity and angle. It experiments about the model room which diminished to one sixth toward the wall tapestry air-conditioner. A laser light sheet is irradiated for the supply air flow and is visualized. The general characteristic of an air flow is analyzed by the PIV method. The flow in the simple model room which without anything indoors was studied to the former. However, in actual room, various objects are placed indoors, and the influence cannot be disregarded. Then, by this report, two types of the objects is placed indoors and it compare with the simple model without an object. As the result, when an object is installed, it is understand that a flow diffused and it spread indoors.