  We derive a catalog of early-type emission-line stars including 30,048
spectra of 25,886 stars from LAMOST DR7, in which 3,922 have Simbad records.
The sample is obtained using K-Nearest Neighbor and Random Forest methods and
visually inspected. The spectra are classified into 3 morphological types (10
subtypes) based on H$\alpha$ emission line profiles. Some spectra contaminated
by nebula emission lines such as from HII regions are flagged in the catalog.
We also provide a specific sub-catalog of 101 stars with the stellar wind by
calculating stellar wind or accretion flow velocities based on P Cygni or
inverse P Cygni profiles, in which 74\% of them having velocities below
400km/s. More important, with two color-color diagrams (H-K, K- W1) and (H-K,
J-H) of a collection of known Herbig Ae/Be stars (HAeBes) and classical Ae/Be
stars (CAeBes), we propose an updated criterion to separate HAeBes from CAeBes.
By the criterion, we select 201 HAeBes candidates and 5,547 CAeBes candidates
from the sample. We confirmed 66 of the 201 HAeBes by using both WISE images
and LAMOST spectra and present a specific HAeBe sub-catalog, in which 58 are
newly identified. In addition, the WISE colors (W1-W2, W1- W3, and W1-W4) show
the distribution consistency between our confirmed HAeBes and that of the known
HAeBes. Most of the 66 confirmed HAeBes locate in the lower edge of the main
sequence of hot end in the HR diagram, while the distances of about 77\% exceed
1Kpc, which enlarges the number of far distant known HAeBes.
