The present invention relates to an LED illuminating device, which includes a lamp cover, a housing, and a base formed in a standardized general modularized manner that can be combined to form the desired appearance of the illuminating device. Also, a lens decorative lighting member, which uses general screw-in manner, is included. The lens decorative lighting member can act as both decorative lighting and lens. The elected lens decorative lighting member can change the light emitting angle and the color temperature arbitrarily. A plug-in integrated light source module consisting of lamp bead and the heat sink is further included. A plug-in three-dimensional circuit-connecting component, which replaces the existing PCB, is further included to form a general component, which can be arbitrarily bent, fixed, and tailored. A plug-in power supply module is further included, wherein additional functions can be arbitrarily selected and replaced based on demands.