Abstract: A reusable electronic circuit assembling system facilitates assembly and testing of electronic circuits. The system has at least one baseboard and one or more assembling blocks magnetically or mechanically attached to the baseboard. Each assembling block has at least two electrically connected conductive clips located separately in the opening holes of the assembly block. Discrete electronic components are connected by selectively inserting the electrodes of the to-be-connected electronic components into the clips of the assembling blocks. A complete circuit is constructed by attaching the above block-component assemblies on the baseboard and connecting them in accordance with the desired circuit diagram.