Two kinds of professional displays widely used were tested to get performance from 6 aspects of time stability, space uniformity, color gamut, color product constant qualitative, channel independence, and color temperature. The two sets of monitors’ display performance were compared. Test results showed that professional display B is slightly better than professional display A on the performance of time stability, chroma stability, and channel independency; professional display A has better uniformity; and both have little difference in other performances. In general, performances of the two kinds of major display are relatively stable.