Marine sea water surface temperature measuring device and measuring method thereof

Disclosed are a marine sea water surface temperature measuring device and a measuring method thereof which are capable of directly reading out data at an observation point, increasing the accuracy, simplifying operating steps and entering the data into a recording device directly. The technical scheme is that the invention is characterized in that the measuring device comprises a platinum resistor temperature sensor (1), a float (2) and a swing pole (3); the platinum resistor temperature sensor (1) is connected with the float (2) and the swing pole (3); the platinum resistor temperature sensor (1) is composed of a platinum resistor (4) and a main control circuit (5); the platinum resistor (4) is connected with the main control circuit (5); the outer side of the platinum resistor (4) is provided with a net-like protective cover (6); and the outer side of the main control circuit (5) is provided with a sealing protective cover (7). The invention further discloses the measuring method thereof.