He saw Bellerin heading up the field too much when he was needed in defence against Tottenham on Sunday, and thinks Arsenal could've avoided their first goal if he played more defensively.
"Work with him," said Adams. "Don't get him on the right wing, say "sit there" and go out there morning and afternoon with the kid and make him into a full back."
However, Adams said that there is also potential for Bellerin to become a great player, comparing him to another club legend.
"He's no better or no worse than Lee Dixon when he came to the club. He was playing like a right winger.
"I went 'Dicko, come here. Sit here. Learn your job. First and foremost stop that ball going in the back of the net'."
Adams was scathing of Bellerin's positioning as the South Korean broke the deadlock.
"Where was Hector when that first goal was going in? He's up the pitch. Do your job first. Learn how to be a good defender, keep clean sheets, then take it from there."
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