A method for mounting a wearable horse cooling device performed by a wearable horse cooling device having two cold water circulating modules and a fixing module, wherein each cold water circulating module has a cooling unit, a wrap and a connection hose assembly, has steps of placing the cooling unit of each cold water circulating module on a body of a horse, adjusting the fixing module and securely connecting the fixing module with each cold water circulating module, connecting the connection hose assembly with the cooling unit and the wrap of each cold water circulating module and mounting the wrap of each cold water circulating module around a portion of the body of the horse, and setting operation parameters for a cooling cycle. Accordingly, the method allows a horse carrying the wearable horse cooling device to freely move during a cooling cycle.
