Using the 1.56m telescope at the Shanghai Observatory ( ShAO ) , China , we monitored two sources , BL Lac object S5 0716+714 and Flat Spectrum Radio Quasar ( FSRQ ) 3C 273 . For S5 0716+714 , we report 4969 sets of CCD ( Charge-coupled Device ) photometrical optical observations ( 1369 for V band , 1861 for R band and 1739 for I band ) in the monitoring time from Dec.4 , 2000 to Apr.5 , 2014 . For 3C 273 , we report 460 observations ( 138 for V band , 146 for R band and 176 for I band ) in the monitoring time from Mar . 28 , 2006 to Apr . 9 , 2014 . The observations provide us with a large amount of data to analyze the short-term and long-term optical variabilities . Based on the variable timescales , we can estimate the central black hole mass and the Doppler factor . An abundance of multi-band observations can help us to analyze the relations between the brightness and spectrum . We use Gaussian fitting to analyze the intra-day light curves and obtain the intra-day variability ( IDV ) timescales . We use the discrete correlation function ( DCF ) method and Jurkevich method to analyze the quasi-periodic variability . Based on the VRI observations , we use the linear fitting to analyze the relations between brightness and spectrum . The two sources both show IDV properties for S5 0716+714 . The timescales are in the range from 17.3 minutes to 4.82 hours ; for 3C273 , the timescale is \Delta T = 35.6 minutes . Based on the periodic analysis methods , we find the periods P _ { V } = 24.24 \pm 1.09 days , P _ { R } = 24.12 \pm 0.76 days , P _ { I } = 24.82 \pm 0.73 days for S5 0716+714 , and P = 12.99 \pm 0.72 , 21.76 \pm 1.45 yr for 3C273 . The two sources displayed the ” bluer-when-brighter ” spectral evolution properties . S5 0716+714 and 3C 273 are frequently studied objects . The violent optical variability and IDV may come from the jet . Gaussian fitting can be used to analyze IDVs . The relations between brightness ( flux density ) and spectrum are strongly influenced by the frequency .