Modular light emitting device

The invention relates to a modular light emitting device. The modular light emitting device comprises a first substrate, a package module, a second substrate and a plurality of light emitting modules, wherein at least one driving unit and at least one circuit component are packaged on the first substrate by the package module, the light emitting modules arranged on the second substrate are driven through electrical connection of the first substrate and the second substrate by the second substrate, or the package module is arranged on the first substrate, and the light emitting modules are arranged on a third substrate, and the second substrate is electrically connected with the first substrate and the third substrate to drive the light emitting modules on the third substrate. Therefore, the light emitting devices are respectively connected with different package modules according to electrical specifications of the light emitting modules, and the configuration freedom of the light emitting devices is improved