The utility model provides a voltage dip location and detection device, it includes consecutive data acquisition device, wireless sensor network, voltage dip signal detection device. The data acquisition device includes voltage, current sensor. Wireless sensor network assembles node equipment and gateway equipment including what link to each other, each sensor with assemble node equipment and link to each other. The device adaptation environment is extensive, possesses the mobility to can fix a position and detect voltage dip, have stronger practicality.