Metal halide perovskite materials show the promising application prospects in solid lighting and display, owing to their tunable band-gap, narrow emission, high carrier mobility, and high photoluminescence quantum yield. The external quantum efficiencies of red and green perovskite emitting-diodes (PeLEDs) have exceeded 20% by optimizing perovskite film composition and device structure. Compared with the red and green PeLEDs, the development of blue PeLEDs is far lagging behind, as a result of the wide bandgap blue perovskite emitters possess poor stability, high defect-state density, and poor charge injection ability. Therefore, this article reviews recent methods to solve these problems in three main perovskite blue emitters, including three-dimensional perovskite, quasi-two-dimensional perovskite, and perovskite quantum dots. Finally, the opportunities and challenges of blue PeLEDs have prospected.