安徽省佛子岭、梅山等7座大坝建坝早，缺乏经验或受非常历史时期干扰，每座坝都存在着缺陷和问题，大坝原有的安全监测系统存在着监测项目不全，观测精度低，达不到大坝安全监测的目的，因此老坝观测系统必须进行更新改造，包括大坝垂线改造，大坝内部观测改造等，以便使大坝监测设施全面符合技术规范的要求，保证观测数据的精度和可靠性． Seven dam dams, such as Foziling and Meishan, Anhui Province, were built as early as lack of experience or interference from the historical period. Each dam has defects and problems. The original dam safety monitoring system has incomplete monitoring items. The observations Therefore, the old dam observation system must be reformed and reconstructed, including the reconstruction of the vertical line of the dam and the observation and reconstruction of the inside of the dam, so that the dam monitoring facilities fully meet the requirements of the technical specifications, Ensure the accuracy and reliability of the observed data.