S5 0716+714 and 3C 273 are frequently studied blazars, which show obvious optical variabilities with different timescales. Using the 1.0 m telescope at the Yunnan Observatory, we monitored the two sources. For S5 0716+714, we report 990 observations during the monitoring duration from JD 2458536 to JD 2458540. For 3C 273, there are 884 observations during the monitoring duration from JD 2458539 to JD 2458542. Based on those observations, we obtain the following results. (1) For S5 0716+714, there lie intra-day optical variabilities (IDVs), with timescales from 0.31 hours to 2.64 hours. For 3C 273, it is possible that there lie IDVs, with timescales from 0.36 hours to 0.49 hours. (2) The time delay of S5 0716+714 is τ_RI = 3.46 min between R and I bands, and the time delay of 3C273 is τ_IV = 6.42 min between I and V bands. (3) We find that, for S5 0716+714, there lies a suspected intra-day period, P ≈ 185.78 min; for 3C 273, there lie intra-day periods, which are about ∼60 min and ∼80 min.

S5 0716+714 和 3C 273 是经常被研究的耀变体，它们在不同的时间尺度上表现出明显的光学变化。我们使用云南天文台的 1.0 m 望远镜对这两个源进行了监测。对于 S5 0716+714，我们在 JD 2458536 到 JD 2458540 的监测期间报告了 990 个观测值。对于 3C 273，在 JD 2458539 到 JD 2458542 的监测期间有 884 个观测值。根据这些观测结果，我们得到以下结果. (1) 对于 S5 0716+714，存在日内光学变率 (IDV)，时间尺度从 0.31 小时到 2.64 小时。对于 3C 273，可能存在 IDV，时间尺度从 0.36 小时到 0.49 小时。(2) S5 0716+714 的时间延迟为R和I之间的τ _RI = 3.46 min频段，3C273 的时间延迟是I和V频段之间的τ _IV = 6.42 分钟。(3)我们发现，对于S5 0716+714，存在一个疑似日内周期，P≈185.78 min；对于 3C 273，存在日内周期，大约为 ∼60 分钟和 ∼80 分钟。