Alert device and alert method thereof

An alert device, comprising:

• an image capturing unit, being configured to capture at least one image of a monitor, wherein the monitor displays a wafer transportation system and a first boundary;
• an input/output unit, being configured to communicate with the wafer transportation system;
• a processing unit, being connected to the input/output unit and the image capturing unit electrically, and configured to:
• retrieve the at least one image from the image capturing unit;
• identify a wafer chuck of the wafer transportation system and the first boundary in the at least one image;
• determine whether the wafer chuck intersects the first boundary in the at least one image;
• and
• transmit an alert signal to the wafer transportation system via the input/output unit when the wafer chuck is determined intersecting the first boundary in the at least one image.

An alert method, comprising:

• capturing, by an image capturing unit, at least one image of a wafer transportation system;
• defining, by a processing unit, a first boundary in the at least one image;
• identifying, by the processing unit, a wafer chuck of the wafer transportation system in the at least one image;
• determining, by the processing unit, whether the wafer chuck intersects the first boundary in the at least one image;
• and
• transmitting, by the processing unit, an alert signal to the wafer transportation system via an input/output unit communicating with the wafer transportation system when the wafer chuck is determined intersect the first boundary in the at least one image.