中文摘要：

从大量文献资料中，收集了BL Lac天体S5 0716＋714光学B，V，R，I波段的有效观测数据点共16818个，获得了从1994年至2006年的长期光变曲线，光变曲线表明S5 0716＋714天体存在完整的非正弦变化并且它的活动非常剧烈．用功率谱方法分析了S50716＋714天体的光变周期，结果表明S50716＋714天体存在的长光变周期为1.1年，Raiteri等人发现的3．3年周期可能是1．1年周期的叠合．预期在2007年2月应该为S5 0716＋714天体的再次爆发期.

英文摘要：

From a large volume of literature we have collected a total of 16818 datapoints of effective observation of BL Lae object S5 0716 ＋ 714 in the optical band, and constructed its long-term light curve from 1994 to 2006 AD. The light curve shows that S5 0716 ＋ 714 is very active and exhibits very complicated non-sinusoidal variations. We used power spectrum method to analyze the period of light curve variation. Our results show that the long-term period of variation is 1.1 year. Time of coincidence is possible, Raiteri et al. have found the period of 3.3 year, which may be a multiple of 1.1-year periods. We expect next burst in 2006 July.