An automatic detergent adding system, comprising: a detergent container containing detergent, and an automatic detergent feeding device connected with the detergent container, wherein the automatic detergent adding system also comprises: a pipe joint separately communicating with the automatic detergent feeding device and a water inlet pipeline, the automatic detergent adding system further comprises a water conduit communicating with an outer drum, and the pipe joint is connected with the water conduit, the automatic detergent feeding device is provided with a conveying pipe that is adapted to convey the detergent, the pipe joint is a bowl-shaped or hollow hemispherical structure, an opening end of the pipe joint is connected with the water conduit, a conveying opening is formed in the pipe joint and the conveying pipe communicates with the pipe joint via the conveying opening, the pipe joint is also provided with a water inlet, the water inlet pipeline communicates with the pipe joint via the water inlet, characterized in that a liquid inlet direction of the conveying opening is deviated from a water flow direction in the water inlet with the water inlet comprising a first water inlet and a second water inlet, the first water inlet and the second water inlet being symmetrically arranged with respect to an axis of the pipe joint so that the detergent is dissolved and diluted by inlet water while flowing through the pipe joint and continuously in the water conduit, before flowing into the outer drum. a detergent container containing detergent, and an automatic detergent feeding device connected with the detergent container, wherein the automatic detergent adding system also comprises: a pipe joint separately communicating with the automatic detergent feeding device and a water inlet pipeline, the automatic detergent adding system further comprises a water conduit communicating with an outer drum, and the pipe joint is connected with the water conduit, the automatic detergent feeding device is provided with a conveying pipe that is adapted to convey the detergent, the pipe joint is a bowl-shaped or hollow hemispherical structure, an opening end of the pipe joint is connected with the water conduit, a conveying opening is formed in the pipe joint and the conveying pipe communicates with the pipe joint via the conveying opening, the pipe joint is also provided with a water inlet, the water inlet pipeline communicates with the pipe joint via the water inlet, characterized in that a liquid inlet direction of the conveying opening is deviated from a water flow direction in the water inlet with the water inlet comprising a first water inlet and a second water inlet, the first water inlet and the second water inlet being symmetrically arranged with respect to an axis of the pipe joint so that the detergent is dissolved and diluted by inlet water while flowing through the pipe joint and continuously in the water conduit, before flowing into the outer drum. a pipe joint separately communicating with the automatic detergent feeding device and a water inlet pipeline, the automatic detergent adding system further comprises a water conduit communicating with an outer drum, and the pipe joint is connected with the water conduit, the automatic detergent feeding device is provided with a conveying pipe that is adapted to convey the detergent, the pipe joint is a bowl-shaped or hollow hemispherical structure, an opening end of the pipe joint is connected with the water conduit, a conveying opening is formed in the pipe joint and the conveying pipe communicates with the pipe joint via the conveying opening, the pipe joint is also provided with a water inlet, the water inlet pipeline communicates with the pipe joint via the water inlet, characterized in that a liquid inlet direction of the conveying opening is deviated from a water flow direction in the water inlet with the water inlet comprising a first water inlet and a second water inlet, the first water inlet and the second water inlet being symmetrically arranged with respect to an axis of the pipe joint so that the detergent is dissolved and diluted by inlet water while flowing through the pipe joint and continuously in the water conduit, before flowing into the outer drum.