Parse json data from log file into Kibana via Filebeat and Logstash

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.