Electronic sphygmomanometers are capable of blood pressure measurement as long as they are manufactured according to national standards. There is no such thing as the best and most accurate. Electronic sphygmomanometers mainly use modern electronic technology and blood pressure indirect measurement principle for blood pressure measurement, the most commonly used for the pressurized synchronous measurement of sphygmomanometer and integrated airway sphygmomanometer. The two for blood pressure measurement principle is different, but the accuracy of the measurement as long as it is in line with the national standards, can be used as a correct reference. In addition, the country has banned the use of mercury sphygmomanometers, the full implementation of electronic sphygmomanometers. Therefore, the technology of electronic sphygmomanometer is relatively mature. There is no need to worry too much about its accuracy. It should be noted that when buying an electronic sphygmomanometer, it should be purchased through regular channels and operated in strict accordance with the requirements, or go to a regular hospital to measure under the guidance of a professional doctor. In order to avoid blood pressure errors and delay treatment.