A chip-to-chip multi-signaling communication system with common conductive layer, which comprises a first chip, a second chip, and a common conductive layer, is disclosed. The first chip has at least a first metal pad and a second metal pad. The second chip has at least a first metal pad and a second metal pad. The common conductive layer is to a conductive material and glued directly to the first chip and the second chip. Wherein, the first metal pad of the second chip is aligned with the first metal pad of the first chip for receiving the signal from the first metal pad of the first chip through the common conductive layer. The interference generated by other pads of the first and the second chips is suppressed by the design of the pads and the common conductive layer.