In modern health management and medical screening scenarios, height and weight data are core indicators for assessing basic health status, and an accurate and convenient height weight scale is the key tool to obtain these data. Our smart height weight scale, supported by the technology of the Institute of Acoustics, Chinese Academy of Sciences (CAS), brings users a professional-level measurement experience. The core advantage of this device stems from its unique acoustic structure designed through simulation technology by the Institute of Acoustics, CAS. It generates a highly directional ultrasonic beam, fundamentally overcoming the inherent limitation of wide beam angles typically associated with traditional piezoelectric transducers, and greatly improving the accuracy of height measurement. Its height measurement range covers 50–200 cm with an accuracy of ±0.1 cm, providing reliable data support for both children's growth monitoring and adult health management. In addition to accurate height measurement, the device also integrates weight measurement and BMI calculation functions, enabling one-stop acquisition of three key data: height, weight, and body mass index, providing comprehensive references for health assessment. At the same time, it fully considers the needs of different usage scenarios: the foldable design makes the device more convenient for storage and transportation, suitable for deployment in hospitals, physical examination centers, community service stations and other scenarios; equipped with a rechargeable battery, it is free from power restrictions, and can flexibly respond to both fixed-point use and mobile patrol testing. From daily physical examinations in hospital lobbies to community health screenings, this smart height weight scale, with its accurate, portable and multi-functional features, has become a reliable assistant in health management work, using technology to escort the collection of basic health data every time.