A new EAS Cherenk
ov light array, Tunka-133, with ge
ometrical area has been installed at the Tunka Valley (50 km fr
om Lake Baikal) in 2009. The array permits a detailed study
of c
osmic ray energy spectrum and mass c
omp
ositi
on in the energy range 10
16-10
18 eV with a unif
orm meth
od. We describe the array c
onstructi
on, DAQ and meth
ods
of the array calibrati
on. The meth
od
of energy rec
onstructi
on and abs
olute calibrati
on
of measurements are discussed. The analysis
of spatial and time structure
of EAS Cherenk
ov light all
ows t
o estimate the depth
of the EAS maximum
Xmax.
The results on the all particles energy spectrum and the mean depth of the EAS maximum Xmax vs. primary energy derived from the data of two winter seasons (2009-2011) are presented. Preliminary results of joint operation of the Cherenkov array with antennas for the detection of EAS radio signals are shown. Plans for future upgrades - deployment of remote clusters, radioantennas and a scintillator detector network and a prototype of the HiSCORE gamma-telescope - are discussed.