The utility model relates to a substation environment temperature sensing device, which comprises a hemispherical glass shell, wherein the inner surface of the hemispherical glass shell is coated by a temperature indicating coating layer, and the lower part of the hemispherical glass shell is boned with a ring-shaped magnet. In addition, the outer diameter of the ring-shaped magnet is identical to the outer diameter of the glass shell, and the inner diameter of the ring-shaped magnet is identical to the inner diameter of the glass shell. Color variation conditions of the temperature indicating coating can be observed from multiple angles because of adoption of the spherical temperature indicating coating layer structure, thereby being capable of visually observing the environment temperature remotely, and playing a role of warning. The substation environment temperature sensing device has the characteristics of easy layout and moisture resistance, is high in environment adaptability, low in cost and convenient to install and maintain.