The data quantity involved in luminance field test using fish-attracting lamps is usually very large and with existing devices, luminance data may vary much due to ship swaying, wave surge and tide. In order to reduce data errors in the measurement, a wireless luminance measurement system was designed. The system uses CC2530 microcontroller as the lower control system, GY-30 module to detect the light intensity, and Zigbee module as the communication apparatus between the master control device and terminal control units. When the GY-30 module is projected with light, it will produce electric current of corresponding magnitude to that of the light. The electric current data will be collected by terminal CC2530 modules and sent to the network coordinator, which is linked to the master computer by USB and thus could further transmit the data. The results showed that, with the single test sample of 7×6 in size, the measuring time using traditional method was about 120 min, while with the new system, the time could be shortened to 20 min, and the accuracy of data was also improved significantly. Therefore, using the new system to measure the light field distribution of large area could reduce, to some extent, the errors and repetitive operations during the luminance measurement.