A method for analyzing temperature in electrode material from bridge to arc in continuity based on finite-difference time-domain heat conduction equation (FDTD-HCE) was proposed. The measured contact power was used as the heat source. In the result, the calculated result on the temperature rise of contact was smaller than that of the experimental result. But the order of calculated result on temperature rise was corresponding to order of that of experimental result. The transient response of calculated temperature was faster than that of experimental result. The heat of the bridge and arc caused the temperature rise at the electrodes. These results indicate that the temperature from bridge to arc can be calculated continuously. At temperature distribution of x-y plane, since the thermal diffusivity of air was smaller than that of silver, the total heat was conducted to the electrodes and holders. On the other hand, at temperature distribution of y-z plane, the heat was diffused in a concentric profile. These results indicate that the temperature distribution can be also calculated by FDTD-HCE. This study is a basic consideration to realize methods analyzing temperature of contacts.