By analyzing the difference between the echoes detected by the W-band radar and the cloud echoes detected by Ka-band radar at the same time, the detection capabilities of the W-band radar prototype are verified. The results show that: 1) W-band radar prototype operates reliably. The macro-parameters of clouds including the layer, boundary and thicker, the fine structure of cloud and the change of the microphysics parameters of clouds can be obtained by both the two band radars. Strong echoes, small speed and broad spectrum of ice clouds reveal existence of updrafts and more supercooled water. 2) The capabilities to detect fog and haze of W-band radar with enhancement pattern in close to the ground is stronger than that of Ka-band radar. The two cloud radars have the same detection capabilities to thin clouds, but the less thicker, lower cloud top and less echo intensity for precipitation and thick clouds with more water content and multilayer clouds are measured by W-band radar because of the stronger attenuation to W-band radar, and the echo intensity of W-band radar is also reduced in the case of Rayleigh scattering.