According to one embodiment of a device for measuring blood pressure, the device includes a pressure sensor, a microprocessor, and a user interface, wherein a user exerts pressure on the users wrist by using the pressure sensor, the pressure sensor senses the pressure to produce oscillation signal, the microprocessor connects with the pressure sensor and receives the oscillation signal to calculate vessel pulse, systolic blood pressure, and diastolic blood pressure of the user, the user interface connects with the microprocessor and receives instruction data of the microprocessor to inform the user.
