  The existing and in development devices at Basic Environmental Observatory
(BEO) Moussala are presented, precisely the experiments connected with space
weather and astroparticle studies. The recent results of the secondary cosmic
ray measurements using atmospheric Cherenkov light telescope are presented
precisely the possibility to study the atmospheric transparency. The final
design of neutron flux meter based on SNM-15 detectors is described as well
several preliminary experimental and Monte Carlo results. The developed muon
telescope based on water Cherenkov detectors is also presented. The scientific
potential is discussed, precisely the connection between cosmic ray
measurements and the environmental parameters, precisely atmospheric
parameters. The project for muon hodoscope and multidirectional Nor Amberd
neutron monitor with the preliminary studies is shown, precisely several
estimations and the possible design
