Visible fiber lasers with visible wavelengths ranging from 380-780 nm have been widely used in lighting, display, medical treatment, astronomy, and other applications. Traditional visible light fiber lasers rely on rare earth ion upconversion to produce visible light laser output, and their efficiency is low. Blue light semiconductor lasers (LD)-pumped rare earth doped gain fibers have recently become the primary approach for generating visible light laser output due to the rapid development of blue light LD. This study introduces the generation methods, the characteristics of blue LD-pumped visible laser, and the recent research progress of blue LD-pumped rare earth ion doped visible fiber laser. Furthermore, it summarizes its application in frequency doubling ultraviolet lasers and the prospects for developing visible light fiber lasers.