Method and system for direct and contactless measurement of surface temperature in a cable

System direct contactless measurement of surface temperature in a cable comprising at least one cable (22) whose temperature desired to be monitored at least one body of temperature measurement (23) enclosing each cable (22), such that each body thermal measurement (23) surrounds a single cable (22); and at least one non-contact temperature sensor (21) which focuses at least a body temperature measurement (23), each body temperature measurement (23) configured to increase the effective area on which impinges at least one temperature sensor contactless (21), thereby increasing the distance which can perform as the temperature sensor without contact (21), and each set temperature sensor without contact (21) being to ensure that at all times the measuring surface is within the area of ​​each measuring body temperature (23) focusing, considering the maximum displacements each thermal measurement body (23) may suffer. A method of direct non-contact surface temperature measurement in a cable, using the defined system.