Abstract: A device for measuring a weight and a length of a fish, the device comprising: a communication unit configured to transmit information to an external terminal; a fixing unit configured to hang and fix the fish; an elastic unit connected to the fixing unit and configured to generate an elastic force in response to the weight of the fish hanging on the fixing unit; a weight measuring unit configured to measure the elastic force using a weight sensor; and a control unit configured to generate information on the weight of the fish on the basis of the measured elastic force.