Matrix multiplication device and operation method thereof

An operation method of a matrix multiplication device, wherein the matrix multiplication device comprises a plurality of first input lines, a plurality of second input lines and a plurality of unit circuits, each of the unit circuits comprises a multiplying-adding circuit, a first register, and a second register, a first input terminal and a second input terminal of the multiplying-adding circuit are respectively coupled to a corresponding first input line of the first input lines and a corresponding second input line of the second input lines, an input terminal and an output terminal of the first register are respectively coupled to an output terminal and a third input terminal of the multiplying-adding circuit, and the second register is coupled to the first register to receive and temporarily store a multiplication accumulation result, the operation method comprising:

• outputting the multiplication accumulation results by the second registers of the unit circuits in a column direction in a first output mode;
• and
• outputting the multiplication accumulation results by the second registers of the unit circuits in a row direction in a second output mode.