SRX

is there a command that display dropped traffics by SRX 

for example host-inbound traffic for ping is not allowed on the traffic interface and a ping is received ... 

You would need to create a policy to deny the traffic and log that policy.

For traffic destined to the SRX you have to create the policy using the junos-host zone.

Log the policy on session initiation

Be aware that deny logging can generate a LOT of logs on interfaces facing the internet.  So local logging will roll over frequently or will consume a lot of space in your syslog.