It is a collecting system of measuring data through CDMA or Fiber Network and measures voltage and current phasor synchronized to GPS on multi sites by using built-in current and voltage sensors in controls of overhead distribution lines. It consists of a measuring device installed in the controller enclosure, a gauging device conneting with the exclusive distribution voltage sensors, and an upper device collecting data. It also has a calibration funtion to correspond to measuring values of each measuring devices with truth voltage on distribution lines by wireless,using a dedicated voltage sensor and a calibration standard device.