Pc Mohammed Rahman, 38, of Maltings Close in Bow, hid his face with a hood as he arrived at Southwark Crown Court.
He pleaded guilty to charges which state he “wilfully misconducted himself” and made searches which were “without any legitimate policing purpose”.
The charges also state his actions were “without reasonable excuse or justification to such a degree as to amount to an abuse of the public’s trust in him” as a police officer.
The misuse of the police computer systems took place on dates between October 2018 and February 2021, according to the charges.
Among the offences, it is said that Rahman made searches relating to himself and family members, as well as looking up names, addresses, dates of birth of individuals, and information relating to an address, a vehicle registration and a telephone number.
He was granted unconditional bail to appear for sentencing at Southwark Crown Court on December 1.
Rahman was charged after an investigation by the Met’s Anti-Corruption and Abuse Command under the direction of the Independent Office for Police Conduct.
The officer, attached to the North East Basic Command Unit, has been suspended from duty, the force said.