An electronic device and a fabrication method thereof are provided. The electronic device includes a circuit structure layer, a package structure, an electronic element, and a plurality of function elements. The circuit structure layer has a first side and a second side opposite to the first side. The package structure is disposed on the first side of the circuit structure layer. The electronic element is embedded or encapsulated in the package structure. The function elements are disposed on the second side of the circuit structure layer. The function elements are electrically connected to the electronic element through the circuit structure layer. The electronic device provided by the disclosure exhibits borderless design or has a large function region.