A mobile terminal, comprising: a camera assembly (21, 41, 71, 131), a camera Board-to-Board connector assembly, an infrared photosensitive assembly and a main circuit board (24, 44, 74, 134), wherein the infrared photosensitive assembly is set on the camera Board-to-Board connector assembly, and is electrically connected with the main circuit board through the camera Board-to-Board connector assembly; characterized in that, the camera Board-to-Board connector assembly comprises: a camera Board-to-Board connector (421, 721) set at a predetermined position of the main circuit board (44, 74), and a camera Board-to-Board connector circuit board (422, 722) set on the camera Board-to-Board connector (421, 721), wherein the infrared photosensitive assembly is set on the camera Board-to-Board connector circuit board (422, 722), and the camera Board-to-Board connector circuit board (422, 722) is electrically connected with the camera assembly (41, 71); or, the camera Board-to-Board connector assembly comprises: a camera Board-to-Board connector set at a predetermined position of the main circuit board; a camera Board-to-Board connector flexible circuit board set on the camera Board-to-Board connector, wherein the camera Board-to-Board connector flexible circuit board comprises a first portion for connecting to the camera Board-to-Board connector, a second portion for setting the infrared photosensitive assembly, a third portion for connecting the first portion with the second portion, and a fourth portion for connecting to the camera assembly; and a camera Board-to-Board connector circuit board set on the first portion of the camera Board-to-Board connector flexible circuit board. a camera assembly (21, 41, 71, 131), a camera Board-to-Board connector assembly, an infrared photosensitive assembly and a main circuit board (24, 44, 74, 134), wherein the infrared photosensitive assembly is set on the camera Board-to-Board connector assembly, and is electrically connected with the main circuit board through the camera Board-to-Board connector assembly; characterized in that, the camera Board-to-Board connector assembly comprises: a camera Board-to-Board connector (421, 721) set at a predetermined position of the main circuit board (44, 74), and a camera Board-to-Board connector circuit board (422, 722) set on the camera Board-to-Board connector (421, 721), wherein the infrared photosensitive assembly is set on the camera Board-to-Board connector circuit board (422, 722), and the camera Board-to-Board connector circuit board (422, 722) is electrically connected with the camera assembly (41, 71); or, a camera Board-to-Board connector (421, 721) set at a predetermined position of the main circuit board (44, 74), and a camera Board-to-Board connector circuit board (422, 722) set on the camera Board-to-Board connector (421, 721), wherein the infrared photosensitive assembly is set on the camera Board-to-Board connector circuit board (422, 722), and the camera Board-to-Board connector circuit board (422, 722) is electrically connected with the camera assembly (41, 71); or, the camera Board-to-Board connector assembly comprises: a camera Board-to-Board connector set at a predetermined position of the main circuit board; a camera Board-to-Board connector flexible circuit board set on the camera Board-to-Board connector, wherein the camera Board-to-Board connector flexible circuit board comprises a first portion for connecting to the camera Board-to-Board connector, a second portion for setting the infrared photosensitive assembly, a third portion for connecting the first portion with the second portion, and a fourth portion for connecting to the camera assembly; and a camera Board-to-Board connector circuit board set on the first portion of the camera Board-to-Board connector flexible circuit board. a camera Board-to-Board connector set at a predetermined position of the main circuit board; a camera Board-to-Board connector flexible circuit board set on the camera Board-to-Board connector, wherein the camera Board-to-Board connector flexible circuit board comprises a first portion for connecting to the camera Board-to-Board connector, a second portion for setting the infrared photosensitive assembly, a third portion for connecting the first portion with the second portion, and a fourth portion for connecting to the camera assembly; and a camera Board-to-Board connector circuit board set on the first portion of the camera Board-to-Board connector flexible circuit board.