The invention discloses a cabinet door connecting device and method. The cabinet door connecting device comprises a cabinet body part, a cabinet door part, a bolt III and a rolling part, wherein the cabinet body part is connected with a cabinet body; the cabinet door part is connected with a cabinet door; and the cabinet body part is hinged to the cabinet door part. The rolling part sleeves the end part of a screw rod of the bolt III and forms a rotating pair together with the bolt III; and the rolling part can rotate around the axis of the bolt III. A threaded hole II is also formed in the upper part or the lower part of a hinging seat of the cabinet body part; and an arc groove is formed in a position, opposite to the threaded hole II, on a hinge head of the cabinet door part. One end, at which the rolling part sleeves, of the bolt III after being fastened into the threaded hole II extends into the arc groove; and the rolling part moves within a travel range of the arc groove. According to the cabinet door connecting device and method, technical problems that an existing door hinge structure has no limiting function and needs to work with the additional limiter, the production and purchase cost of the limiter is increased, the assembling labor cost is increased and the assembling complex rate is increased can be solved.