With the advanced Augmented Reality technology, the Augmented Reality applications become quite important in every field such as tourism, learning materials, furniture furnishings for on-line furnishing purchase in the era of COVID-19 pandemic. In order to make users easy to use, this study uses markerless AR to develop furniture furnishings for on-line furnishing purchase. Without the use of marker in AR, it leads to the degradation of 3D spatial sensation for the virtual object in the real scene. The purpose of this study is to use a webcam that is not equipped with depth measurements and Hough transform to estimate the image depth information. This system provides a low-cost solution of the convenient and accurate AR furniture furnishing system for on-line furnishing purchase.