Abstract: The present application relates to a fragrance atomization and diffusion device convenient for replacing a fragrance liquid container. The fragrance atomization and diffusion device convenient for replacing a fragrance liquid container comprises a housing, an atomization mechanism, a bottom cover and a top cover respectively located at two ends of the housing and enclosing a chamber, a bracket fixedly mounted within the chamber, a gas supply assembly and a power supply assembly, the atomization mechanism, the gas supply assembly and the power supply assembly each mounted at the bracket; the bracket is provided along the vertical direction with a mount cavity for mounting the atomization mechanism, an end of which extends through the top cover; and the atomization mechanism comprises an atomization head and a liquid storage bottle connected to the atomization head. The present application has the advantage of convenient addition of a fragrance liquid.