The lighting industry is always a major consumer in China’s energy sector. Finding efficient and healthy white light sources has always been an important task in the lighting industry. Since the introduction of Dr. CW Tang from Kodak in 1987, organic light-emitting diodes (OLEDs) have been widely used in the field of small-size displays and approved by the market after decades of development. In the field of lighting, white organic light-emitting diodes (WOLEDs), strong competitor for new solid-state lighting sources in the future, are also receiving more and more attention for their high performance, flexibility, surface light source, and blue-damage-free. With the in-depth development of OLED technology, white organic light-emitting diodes have been developed in many aspects in theory, technology, application, etc., and have achieved many important results. This paper reviews the recent design methods, major developments, and problems faced by white organic semiconductors. In this paper, white organic light-emitting diodes are mainly summarized from three kinds of device construction methods: full-fluorescence WOLEDs, all-phosphor WOLEDs, and hybrid WOLEDs.