The invention provides a wearable cooling device. The device comprises a wearable cooling main body, and the wearable cooling main body is arranged on a to-be-cooled target object; the wearable cooling main body comprises a wearable body and a water seepage device, and the water seepage device is arranged on the wearable body; the wearable body comprises a cooling layer, and the water seepage device is uniformly distributed in the cooling layer. The cooling device is simple in structure and low in energy consumption, is not limited by the size of pasture and directly applied to the target object such as a dairy cow, and is low in cost, wide in application range and beneficial to mass production and application. By means of the device, the body temperature, respiration frequency and motion conditions of the dairy cow can be monitored remotely; in the cow breeding process, full-automatic remote monitoring and cooling are achieved, and the problems of heatstroke and the like, caused by high temperature influence, of the dairy cow are found in time. The device is used for cooling the dairy cow by utilizing water evaporation, and solves the problem of slow growth and development, caused by high temperature, of the dairy cow.