Construction machine and user login method using same

A construction machine comprising:

• at least one smart key interworking with the construction machine;
• a start lock device configured to set a lock suspension time based on an input of a previous user of the construction machine;
• and
• a user login device configured to:
• identify a current user of the construction machine as any one of a public user, a previous user, or a specific user based on usage of a password and a time point at which the at least one smart key is used, and
• apply the identified current user's settings to the construction machine,
• wherein the specific user is a user logged in using the password and whose setting and operation information are stored in the storage device, the previous user is a last user that used the construction machine, and the public user is a user which is not the specific user or the previous user, and
• wherein the user login device identifies the current user of the construction machine as the previous user when the same smart key as a previous user's smart key is recognized within the lock suspension time after the construction machine is turned off in a state in which a start lock function is activated.

A user login method comprising:

• identifying a current user of a construction machine as any one of a public user, a previous user, or a specific user based on usage of a password and a time point at which a smart key is used, wherein the specific user is a user logged in using the password and whose setting and operation information are stored in the storage device, the previous user is a last user that used the construction machine, and the public user is a user which is not the specific user or the previous user;
• and
• setting the construction machine based on the identified current user,
• wherein the identifying the current user of the construction machine includes identifying the current user of the construction machine as the previous user when the same smart key as a previous user's smart key is recognized within a lock suspension time after the construction machine is turned off in a state in which a start lock function is activated.