A binocular stereo vision device, wherein the binocular stereo vision device comprises: an acquisition system including two acquisition units arranged at intervals and being configured to acquire a depth distance from a measured object to the acquisition system; an adjustment mechanism configured to adjust a distance between the two acquisition units; a sensor configured to acquire an initial distance between the two acquisition units; and a processing unit configured to obtain a standard distance between the two acquisition units according to the acquired depth distance from the measured object to the acquisition system and output a control signal according to a difference between the standard distance and the initial distance, wherein the adjustment mechanism adjusts the distance between the two acquisition units to be equal to the standard distance according to the control signal outputted by the processing unit, characterized in that the processing unit includes: a calculation module configured to obtain the standard distance according to a formula D best = ( L ∗ F)/ R Z and obtain an initial control signal according to the difference between the standard distance and the initial distance, in which D best refers to the acquired depth distance from the measured object to the acquisition system; L refers to the standard distance between the two acquisition units; F refers to the focal length of the acquisition units; R Z refers to a depth resolution; and a control module being in signal connection with the calculation module and configured to output the control signal according to the received initial control signal to control the adjustment mechanism to adjust the distance between the two acquisition units. an acquisition system including two acquisition units arranged at intervals and being configured to acquire a depth distance from a measured object to the acquisition system; an adjustment mechanism configured to adjust a distance between the two acquisition units; a sensor configured to acquire an initial distance between the two acquisition units; and a processing unit configured to obtain a standard distance between the two acquisition units according to the acquired depth distance from the measured object to the acquisition system and output a control signal according to a difference between the standard distance and the initial distance, wherein the adjustment mechanism adjusts the distance between the two acquisition units to be equal to the standard distance according to the control signal outputted by the processing unit, characterized in that the processing unit includes: a calculation module configured to obtain the standard distance according to a formula D best = ( L ∗ F)/ R Z and obtain an initial control signal according to the difference between the standard distance and the initial distance, in which D best refers to the acquired depth distance from the measured object to the acquisition system; L refers to the standard distance between the two acquisition units; F refers to the focal length of the acquisition units; R Z refers to a depth resolution; and a control module being in signal connection with the calculation module and configured to output the control signal according to the received initial control signal to control the adjustment mechanism to adjust the distance between the two acquisition units. a calculation module configured to obtain the standard distance according to a formula D best = ( L ∗ F)/ R Z and obtain an initial control signal according to the difference between the standard distance and the initial distance, in which D best refers to the acquired depth distance from the measured object to the acquisition system; L refers to the standard distance between the two acquisition units; F refers to the focal length of the acquisition units; R Z refers to a depth resolution; and a control module being in signal connection with the calculation module and configured to output the control signal according to the received initial control signal to control the adjustment mechanism to adjust the distance between the two acquisition units.