An air conditioner indoor unit, comprising: a housing having an air outlet channel; the air supply apparatus used for an air conditioner comprising an annular outer frame and an impeller assembly, wherein the annular outer frame has an outer surface formed as a partial spherical surface and has an accommodating space therein; the impeller assembly is provided in the accommodating space and pivotally connected to the outer frame, and the impeller assembly has an air suction side and an air outlet side, wherein the air supply apparatus is disposed in the air outlet channel and rotatable related to the housing; and an evaporator disposed in the housing and located at the air suction side of the impeller assembly of the air supply apparatus, wherein the air outlet channel has an air outlet, an annular wall is provided at the air outlet, an inner surface of the annular wall is formed as a partial spherical surface, and the outer frame of the air supply apparatus is connected to the annular wall in a pivotal manner by a rotation apparatus, and wherein the air supply apparatus is rotatable along at least one axis of the air outlet; wherein the rotation apparatus comprises: a first rotation mechanism connected to the annular wall in a movable manner; and a first driving mechanism driving the first rotation mechanism to rotate about a first axis; characterized in that the first rotation mechanism comprises: a first shaft piece and a second shaft piece, the first shaft piece and the second shaft piece being disposed between the outer frame and the annular wall and provided on two opposite sides of the outer frame, respectively, the first shaft piece and the second shaft piece being connected to the outer frame and to the annular wall in a movable manner respectively, the first shaft piece and the second shaft piece having a co-axis with the first axis, wherein the first driving mechanism drives at least one of the first shaft piece and the second shaft piece to rotate. a housing having an air outlet channel; the air supply apparatus used for an air conditioner comprising an annular outer frame and an impeller assembly, wherein the annular outer frame has an outer surface formed as a partial spherical surface and has an accommodating space therein; the impeller assembly is provided in the accommodating space and pivotally connected to the outer frame, and the impeller assembly has an air suction side and an air outlet side, wherein the air supply apparatus is disposed in the air outlet channel and rotatable related to the housing; and an evaporator disposed in the housing and located at the air suction side of the impeller assembly of the air supply apparatus, wherein the air outlet channel has an air outlet, an annular wall is provided at the air outlet, an inner surface of the annular wall is formed as a partial spherical surface, and the outer frame of the air supply apparatus is connected to the annular wall in a pivotal manner by a rotation apparatus, and wherein the air supply apparatus is rotatable along at least one axis of the air outlet; wherein the rotation apparatus comprises: a first rotation mechanism connected to the annular wall in a movable manner; and a first driving mechanism driving the first rotation mechanism to rotate about a first axis; a first rotation mechanism connected to the annular wall in a movable manner; and a first driving mechanism driving the first rotation mechanism to rotate about a first axis; characterized in that the first rotation mechanism comprises: a first shaft piece and a second shaft piece, the first shaft piece and the second shaft piece being disposed between the outer frame and the annular wall and provided on two opposite sides of the outer frame, respectively, the first shaft piece and the second shaft piece being connected to the outer frame and to the annular wall in a movable manner respectively, the first shaft piece and the second shaft piece having a co-axis with the first axis, wherein the first driving mechanism drives at least one of the first shaft piece and the second shaft piece to rotate.