  The outburst and spin-down glitch of magnetars are modeled from the
magnetospheric point of view. We try to discuss the following four questions:
(1) Which pulsar on the period and peirod-derivative diagram are more likely to
show magnetar outburst? (2) Which outburst will make the glitch that triggered
the outburst to become a spin-down glitch? (3) Can we model the outburst and
spin-down glitch in PSR J1119$-$6127 simultaneously? (4) Why the torque
variation is delayed compared with the peak of the X-ray luminosity in 1E
1048.1$-$5937 and PSR J1119$-$6127? It is found that both the global and local
twisted magnetic field will affect the radiation and timing behaviors of
magnetars. Especially, the delay of torque variations may due to the combined
effect of increasing twist in the j-bundle and untwisting of the global
magnetosphere. A toy model is build for magnetar outburst and torque
variations. It can catch the general trend of magnetar outburst: decaying flux,
shrinking hot spot, and torque variations.
