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We present a study on stellar population and kinematics of globular clusters(GCs) in the peculiar galaxy M85. We obtain optical spectra of 89 GCs at 8 kpc$< R <$ 160 kpc using the MMT/Hectospec. We divide them into three groups,blue/green/red GCs (B/G/RGCs), with their $(g-i)_0$ colors. All GCsubpopulations have mean ages of 10 Gyr, but showing differences inmetallicities. The BGCs and RGCs are the most metal-poor ([Z/H] $\sim -1.49$)and metal-rich ([Z/H] $\sim -0.45$), respectively, and the GGCs are in between.We find that the inner GC system exhibits a strong overall rotation that isentirely due to a disk-like rotation of the RGC system. The BGC system showslittle rotation. The GGCs show kinematic properties clearly distinct among theGC subpopulations, having higher mean velocities than the BGCs and RGCs andbeing aligned along the major axis of M85. This implies that the GGCs have anorigin different from the other GC subpopulations. The rotation-correctedvelocity dispersion of the RGC system is much lower than that of the BGCsystem, indicating the truncation of the red halo of M85. The BGCs have a flatvelocity dispersion profile out to $R$ = 67 kpc, reflecting the dark matterextent of M85. Using the velocity dispersion of the BGC system, we estimate thedynamical mass of M85 to be $3.8 \times 10^{12} M_{\odot}$. We infer that M85has undergone merging events lately, resulting in the peculiar kinematics ofthe GC system.

Mysterious Globular Cluster System of the Peculiar Massive Galaxy M85