An electronic package includes a circuit structure having a first metal layer, a packaging layer formed on the circuit structure, and a second metal layer formed on the packaging layer and separated from the first metal layer at a distance. The first metal layer and the second metal layer constitute an antenna structure. Since the second metal layer is formed on a portion of a surface of the packaging layer, a propagating wave emitted by the first metal layer cannot pass through the second metal layer, but a surface of the packaging layer not covered by the second metal layer. Therefore, the propagating wave can be transmitted to a predetermined target, and the electronic package performs the function of an antenna.