  Here we report an identification of B3\,0749+460A as a new double-peaked
local "changing-look" active galactic nucleus (CL-AGN) in terms of our
multi-epoch spectroscopic analysis. By comparing our new spectra taken in 2021
with the ones taken by the Sloan Digital Sky Survey in 2004, BOSS in 2013, and
MaNGA in 2016, we reveal type transitions of Seyfert (Sy)
1.9$\rightarrow$Sy1.8$\rightarrow$Sy1.9. In the transitions, the classical
broad H$\alpha$ emission fades away since 2013, and disappears in our 2021
spectrum, although the absence of broad H$\beta$ can be traced back to at least
2016. A follow-up observation in X-rays by the {\it Swift}/XRT reveals that (1)
the X-ray emission level gradually decreases since 2005; and (2) the X-ray
spectrum is soft in the optical "turn-off" state and hard in the "turn-on"
state. We argue that the disappearance of the classical broad H$\alpha$
emission can be likely explained by the disk-wind broad-line-region model, in
which the CL phenomenon is sensitive to luminosity in individual AGNs.
