  This paper presents the Charge-Coupled Device time-series photometric
observations of the open cluster NGC 1582 and its surrounding field with
Johnson B, V and R filters by using Nanshan 1m telescope of Xinjiang
Astronomical Observatory. 19 variable stars and 3 variable candidates were
detected in a 45 {\times} 48.75 field around the cluster. 12 of the variable
stars are newly-discovered variable objects. The physical properties,
classifications, and membership of the 22 objects are studied through their
light curves, their positions on the color-magnitude diagram, and with the
archival data from the Naval Observatory Merged Astrometric Dataset. Among
these objects, 5 are eclipsing binary systems, 6 are pulsating variable stars
including one known Delta Scuti star and one newly-discovered RR Lyrae star.
The distance of the RR Lyrae star is estimated to be 7.9 {\pm} 0.3 kpc,
indicates that the star locates far behind the cluster. 4 variable stars are
probable members of the cluster, and 13 of the 22 objects are confirmed to be
field stars.
