Background: Edge rotation diagnostic system(ERD) with spatial and temporal resolution has been developed on EAST Tokamak.Purpose: The ERD system is an effective method to research the radiation phenomenon of C

O

Li

N

He and Ar in visible range.The ERD has been used for the measurement of ion temperature and rotation velocity at the edge plasma.Methods: The measurement was done by using an optical fiber spectrometer and two systems of lenses.Results: The ion radiant flux coupled by each fiber can be expressed as an analytical form

and the sightline of each fiber was determinated

and the spectrometer was calibrated by using a halogen lamp.Conclusions: The initial experimental results were obtained by analysing spectral lines of CIII

which results suggest that ERD has the ability to provide edge ion temperature and rotation velocity.