The invention discloses an intelligent bracelet design based on a three-axis acceleration sensor. Society is developing, science and technology are advancing, human life is getting better, and the human need for monitoring the state of human motion is becoming more urgent, so that the design creates the intelligent bracelet based on the development of a digit output acceleration sensor ADXL345 based on a micro-electro-mechanical system and an ultra-low power consumption single-chip microcomputer MSP430F169; when a person walks, the bracelet can collect various information of the human body through the sensor; a step counting function is achieved by utilizing a vector summation algorithm; and heat consumption during walking is estimated.