The basic requirements for a settlement observation, equipment, personnel quality requirements according to the settlement observation characteristics of high precision, in order to accurately reflect the building (structure) building materials in continuous loading under the settlement, the general provisions of the measurement error should deformation values ??less than 1 / 10-1 / 20, for which the requirements of the settlement observation should use Precision Level (S1 or S05 grade), leveling feet should also be used by small temperature changes affect the environment and indium alloy precision leveling rod. In the case of indium alloy does not have the level of foot, using the general to make use of the first paragraph of the ruler foot tower. Workers must receive professional learning and skills training, proficiency instrument procedures, familiar measurement theory, can address different engineering characteristics of the specific circumstances of the use of different methods of observation and observation procedures, the problems in the implementation process can analyze the cause and correct adjustment calculation using error theory, on time, fast and accurate completion of each observation mission. 2, settlement observation observation time requirements building (structure) building materials of the time, there are strict limits, especially first-time observer must be on time, other retest each stage, according to the progress of the project should be regularly carried out, not leak test or and supplementary. The only way to get an accurate settlement or law. Two adjacent intervals is called an observation period, the settlement observation general rise buildings by a certain period of time for the observation period (eg: 30 days / times) or by loading conditions of the building is increased by one (or layers) for a period of observation, no matter what methods are applied to measure the program must be specified in the observation period were punctual.