A measurement program of wide-wave band based DTL-1 sky brightness meter is developed to gain the real time sky background radiance fast. The principle for measuring the integral radiance in wave range from visible to near-infrared (400~1000 nm) is analyzed. Furthermore, the response coefficient and luminous efficiency are calculated, and an error analysis for the measurement results is made. The linearity checking of the DTL-1 and the data are carried out using spectrometer. The relative error is below 10%, which indicates the credibility of the instrument. The precision of the instrument can satisfy the requirement on real application. The all sky radiances in Hefei and Southwest districts are measured by using DTL-1, and the measurement data in the two districts are analyzed in brief.