  We report the first discovery of a multi-planetary system by the HATSouth
network, HATS-59b,c, a planetary system with an inner transiting hot Jupiter
and an outer cold massive giant planet, which was detected via radial velocity.
The inner transiting planet, HATS-59b, is on an eccentric orbit with $e =
0.129\pm0.049$, orbiting a $V=13.951\pm0.030$ mag solar-like star ($M_* =
1.038\pm0.039 M_{\odot}$, and $R_* = 1.036\pm0.067 R_{\odot}$) with a period of
$5.416077\pm0.000017$ days. The outer companion, HATS-59c is on a circular
orbit with $ m \sin i = 12.8\pm1.1 M_\mathrm{J}$, and a period of $1422\pm14$
days. The inner planet has a mass of $0.806\pm0.069 M_\mathrm{J}$ and a radius
of $1.126\pm0.077 M_\mathrm{J}$, yielding a density of $0.70\pm0.16 {\rm
g\,cm^{-3}}$. Unlike most of the planetary systems that include only a single
hot Jupiter, HATS-59b,c includes, in addition to the transiting hot Jupiter, a
massive outer companion. The architecture of this system is valuable for
understanding planet migration.
