The utility model provides the technical scheme of a sampling and temperature-measuring device for blast-furnace gas. The sampling and temperature-measuring device comprises a tubular main body, wherein one end of the tubular main body is provided with a conical head, and the other end of the tubular main body is provided with a baffle; and a small cavity is formed in the tubular main body and is close to one end of the conical head, an air inlet window is arranged on the small cavity, the tubular main body is also internally provided with a coal gas sampling pipe, a cooling water inlet pipe, a cooling water outlet pipe and a temperature measuring component casing pipe, a temperature measuring component is arranged in the temperature measuring component casing pipe, the coal gas sampling pipe and the temperature measuring component casing pipe penetrate through the small cavity and are welded with the small cavity, and the temperature measuring component extends into the small cavity. The sampling and temperature-measuring device for the blast-furnace gas is beneficial to the reasonable material distribution of a blast furnace, and energy conservation and emission reduction of the blast furnace, and improving the utilization rate of the gas.