You will need to create a separate input for each of these files. So your filebeat.yml configuration will contain something like this:
filebeat.inputs:
- type: log
path: /tiennd/filebeat/logstash/room.log
index: room_data # or whatever index you want room logs to go into
- type: log
path: /tiennd/filebeat/logstash/account.log
index: account_data # or whatever index you want account logs to go into
Each input can have it's own configuration, including index as shown above. See https://www.elastic.co/guide/en/beats/filebeat/current/filebeat-input-log.html for the configuration options available on the log input.