The invention relates to a remote monitoring system for mountain highway tunnel construction. The system comprises a monitoring center, wherein a database server, a communication server, a management server, an application server, a monitoring terminal, a browsing terminal and a monitoring terminal are arranged in the monitoring center; the monitoring center is connected with a superior competent department and an in-tunnel control chamber; a remote monitoring unit set and an alarm terminal are arranged in the in-tunnel control chamber; the remote monitoring unit set comprises a plurality of remote monitoring units; all the remote monitoring units are connected with a plurality of remote acquiring units arranged in a tunnel in a one-to-one correspondence manner; the plurality of remote acquiring units are connected with environment monitoring equipment, a structure monitoring sensor, a deformation monitoring sensor, a water level sensor or an earthquake monitor arranged in the tunnel. The system combines various design, construction, supervision, monitoring information and the like and can assist all levels of management departments and all parties in a project in mastering the security condition of tunnel civil construction timely.