An information generating apparatus and an operation method thereof are provided. The information generating apparatus includes a first logic contact, a second logic contact, an information output contact and a plurality of switches SW(i,j), wherein SW(i,j) represents a jth switch in an ith layer, 1≦i≦L, and 1≦j≦2(i−1). The switch SW(i,j) has a first input terminal, a second input terminal and an output terminal, wherein the output terminal is selectively connected to the first or the second input terminal. The first and the second input terminals of the switches SW(Lj) in the Lth layer are respectively connected to the first logic contact and the second logic contact. The first and the second input terminals of the switch SW(i,j) in other layers are respectively connected to the output terminals of the switches SW(i+1,2j−1) and SW(i+1,2j). The output terminal of the switch SW(1,1) is connected to the information output contact.