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Variability is one of the extreme observational properties of BL Lacertaeobjects. AO 0235+164 is a well studied BL Lac through the wholeelectro-magnetic wavebands. In the present work, we show its optical R bandphotometric observations carried out during the period of Nov, 2006 to Dec.2012 using the Ap6E CCD camera attached to the primary focus of the $\rm 70-cm$meniscus telescope at Abastumani Observatory, Georgia. It shows a largevariation of $\Delta R$ = 4.88 mag (14.19 - 19.07 mag) and a short time scaleof $\Delta T_v$ = 73.5 min during our monitoring period. During the period ofDec. 2006 to Nov. 2009, we made radio observations of the source using the 25-mradio telescope at Xinjiang Astronomical Observatory. When a discretecorrelation function (DCF) is adopted to the optical and radio observations, wefound that the optical variation leads the radio variation by 23.2$\pm$12.9days.

The Variability and Period Analysis for the BL Lac AO 0235+164