A handheld device, comprising: a body; a first sensor, disposed on a first side of the body; a second sensor, disposed on a second side of the body different from the first side; and a processor, coupled to the first and second sensors (110, 120), and configured for: obtaining sensing data of the first and second sensors (110, 120); determining the handheld device is in a left hand state or a right hand state according to a compared result between sensing data of the first and second sensors (110, 120), wherein the compared result comprises a force comparison between forces applied on the first and second sides (S1, S2) of the body; characterized in that the compared result comprises a number comparison between a number of at least one touch point detected by the first sensor and a number of at least one touch point detected by the second sensor; and in that the processor is configured for: determining the handheld device is in the left hand state or the right hand state according to a distance comparison between a distance between two touch points on the first side and a distance between two touch points on the second side in response to the number of the at least one touch point detected by the first sensor and the number of the at least one touch point detected by the second sensor being two; and determining the handheld device is in the left hand state or the right hand state according to the force comparison in response to the number of the at least one touch point detected by the first sensor and the number of the at least one touch point detected by the second sensor being one. a body; a first sensor, disposed on a first side of the body; a second sensor, disposed on a second side of the body different from the first side; and a processor, coupled to the first and second sensors (110, 120), and configured for: obtaining sensing data of the first and second sensors (110, 120); determining the handheld device is in a left hand state or a right hand state according to a compared result between sensing data of the first and second sensors (110, 120), wherein the compared result comprises a force comparison between forces applied on the first and second sides (S1, S2) of the body; obtaining sensing data of the first and second sensors (110, 120); determining the handheld device is in a left hand state or a right hand state according to a compared result between sensing data of the first and second sensors (110, 120), wherein the compared result comprises a force comparison between forces applied on the first and second sides (S1, S2) of the body; characterized in that the compared result comprises a number comparison between a number of at least one touch point detected by the first sensor and a number of at least one touch point detected by the second sensor; and in that the processor is configured for: determining the handheld device is in the left hand state or the right hand state according to a distance comparison between a distance between two touch points on the first side and a distance between two touch points on the second side in response to the number of the at least one touch point detected by the first sensor and the number of the at least one touch point detected by the second sensor being two; and determining the handheld device is in the left hand state or the right hand state according to the force comparison in response to the number of the at least one touch point detected by the first sensor and the number of the at least one touch point detected by the second sensor being one. determining the handheld device is in the left hand state or the right hand state according to a distance comparison between a distance between two touch points on the first side and a distance between two touch points on the second side in response to the number of the at least one touch point detected by the first sensor and the number of the at least one touch point detected by the second sensor being two; and determining the handheld device is in the left hand state or the right hand state according to the force comparison in response to the number of the at least one touch point detected by the first sensor and the number of the at least one touch point detected by the second sensor being one.