  The light curves of solar-type stars present both periodic fluctuation and
flare spikes. The gradual periodic fluctuation is interpreted as the rotational
modulation of magnetic features on the stellar surface and is used to deduce
magnetic feature activity properties. The flare spikes in light curves are used
to derive flare activity properties. In this paper, we analyze the light curve
data of three solar-type stars (KIC 6034120, KIC 3118883, and KIC 10528093)
observed with Kepler space telescope and investigate the relationship between
their magnetic feature activities and flare activities. The analysis shows
that: (1) both the magnetic feature activity and the flare activity exhibit
long-term variations as the Sun does; (2) unlike the Sun, the long-term
variations of magnetic feature activity and flare activity are not in phase
with each other; (3) the analysis of star KIC 6034120 suggests that the
long-term variations of magnetic feature activity and flare activity have a
similar cycle length. Our analysis and results indicate that the magnetic
features that dominate rotational modulation and the flares possibly have
different source regions, although they may be influenced by the magnetic field
generated through a same dynamo process.
