The invention provides an adaptive cruise control device and a method based on the trust degree of a driver, in accordance with that present invention, The invention obtains the physiological information, interactive information and cruise control device performance value of the driver under the driving state, calculates and estimates the trust degree, obtains the driving information under the current state, combines with the estimated trust degree, calculates the expected acceleration, utilizes the longitudinal motion model, generates the driving control information, and controls the vehicleto carry out adaptive cruising. The technical proposal of the invention is conducive to improving the accuracy of calculating the trust degree of the driver to the adaptive cruise control device, improving the safety and reliability of the vehicle cruise, and improving the use experience of the driver.