  The ground-based wide-angle camera array (GWAC) generates millions of single
frame alerts per night. After the complicated and elaborate filters by multiple
methods, a couple of dozens of candidates are still needed to be confirmed by
follow-up observations in real-time. In order to free scientists from the
complex and high-intensity follow-up tasks, we developed a Real-time Automatic
transient Validation System (RAVS), and introduce here its system architecture,
data processing flow, database schema, automatic follow-up control flow, and
mobile message notification solution. This system is capable of automatically
carrying out all operations in real-time without human intervention, including
the validation of transient candidates, the adaptive light-curve sampling for
identified targets in multi-band, and the pushing of observation results to the
mobile client. The running of RAVS shows that an M-type stellar flare event can
be well sampled by RAVS without a significant loss of the details, while the
observing time is only less than one-third of the time coverage. Because the
control logic of RAVS is designed to be independent of the telescope hardware,
RAVS can be conveniently transplanted to other telescopes, especially the
follow-up system of SVOM. Some future improvements are presented for the
adaptive light-curve sampling, after taking into account both the brightness of
sources and the evolution trends of the corresponding light-curves.
