%ASun, Tianrui%ALi, Xiaoyan%AHu, Lei%AMeng, Kelai%AHan, Zijian%AHu, Maokai%ALi, Zhengyang%AWen, Haikun%ADu, Fujia%AYang, Shihai%AGu, Bozhong%AYuan, Xiangyan%ALi, Yun%AWang, Huihui%ALiu, Lei%AZhu, Zhenxi%AHuang, Xuehai%ALei, Chengming%AWang, Lifan%AWu, Xuefeng%BJournal Name: Universe; Journal Volume: 8; Journal Issue: 6 %D2022%I %JJournal Name: Universe; Journal Volume: 8; Journal Issue: 6 %K %MOSTI ID: 10352471 %PMedium: X %TAntarctic Survey Telescope 3-3: Overview, System Performance and Preliminary Observations at Yaoan, Yunnan %XThe third Antarctic Survey Telescope array instrument at Dome A in Antarctica, the AST3-3 telescope, has been in commissioning from March 2021. We deployed AST3-3 at the Yaoan astronomical station in Yunnan Province for an automatic time-domain survey and follow-up observations with an optimised observation and protection system. The telescope system of AST3-3 is similar to that of AST3-1 and AST3-2, except that it is equipped with a 14 K × 10 K QHY411 CMOS camera. AST3-3 has a field of view of 1.65∘×1.23∘ and is currently using the g band filter. During commissioning at Yaoan, AST3-3 aims to conduct an extragalactic transient survey, coupled with prompt follow-ups of opportunity targets. In this paper, we present the architecture of the AST3-3 automatic observation system. We demonstrate the data processing of observations by representatives SN 2022eyw and GRB 210420B. %0Journal Article