Light emitting component measuring system and the method thereof

A light emitting component measuring system, for measuring the optical proprieties of a device under test (DUT), the DUT receiving electricity and outputting an initial ray with a first wavelength range, the measuring system comprising:

• a filtering device, comprising:
• a first filtering portion for filtering a third wavelength range of the initial ray and outputting a first filtered ray with a second wavelength range;
• and
• a second filtering portion for filtering a fifth wavelength range of the initial ray and outputting a second filtered ray with a fourth wavelength range;
• a sensing device, for receiving the first filtered ray outputted from the first filtering portion and generating a first data accordingly, and for receiving the second filtered ray outputted from the second filtering portion and generating a second data accordingly;
• and
• a calculating device, for generating a relative intensity-wavelength graph of the initial ray according to the first data and the second data.